Professor Lyazid Djenidi
Professor
School of Engineering (Mechanical Engineering)
 Email:lyazid.djenidi@newcastle.edu.au
 Phone:(02) 4921 6184
Career Summary
Biography
 Mechanical Engineering  Fluid Mechanics  Turbulence  Computational fluid dynamics
Qualifications
 PhD, University of Aix, Marseille II France
 Master of Science, University of Aix, Marseille II France
 Bachelor of Science, University of Aix, Marseille II France
Keywords
 Computational fluid dynamics
 Fluid Mechanics
 Fluid mechanics
 Heat transfer
 Modelling of dynamic systems
 Numerical simulation
 Turbulence
Languages
 French (Fluent)
Professional Experience
UON Appointment
Title  Organisation / Department 

Professor  University of Newcastle School of Engineering Australia 
Professor  University of Newcastle School of Engineering Australia 
Academic appointment
Dates  Title  Organisation / Department 

1/11/2007  1/12/2007  Associate Professor  Ecole Central d'Ingenieurs Generalists de Marseille (Central School of Engineers generalists Marseille) France 
1/11/2006  1/12/2006  Maitre de Conferece  Ecole Generaliste d'ingenieurs de Marseille (Generalist School of engineers Marseille) France 
1/1/2010  1/2/2010  Professor  University of Grenoble France 
1/9/2008  1/2/2009  Professor  University of Grenoble France 
Membership
Dates  Title  Organisation / Department 

1/1/2015  
Member International Reader for the ARC Funding Body 
ARC Australia 
1/1/2015  
Member Conference Advisory Committee 
International Symposium on Turbulence and Shear Layer Phenomena (TSLP) Australia 
1/1/2015  
Member Conference Advisory Committee 
International Symposium on Application of Laser Techniques to Fluids Flows (ALTFF) Australia 
Member Conference Advisory Committee 
International Symposuim on Engineering Turbulence Modelling and Measurements (ETMM) Australia 
Invitations
Participant
Year  Title / Rationale 

2006 
International Journal Articles Organisation: Academic Journal Publishers Description: Referring International Journal articles: Journal of Fluid Mechanics; Physics of Fluids; Physics Letters A Experiments in Fluids International Journal of Heat and Fluid Flow European Journal of Mech. B/Fluids 
2006 
Invited Associate Professor Organisation: Ecole Centrale d'Ingenieurs Generalistes de Marseille 
2005 
Lattice Boltzmann Simulation Organisation: PSA PeugeotCitroen Description: Invited to present to give a presentation of my numerical simulations. 
1998 
L. Djeindi: Turbulence modelling for CFD Organisation: Workshop in Application for CFD in Engineering., Chemical Engineringn Newcastle Description: Invited to present a keynote paper. 
Publications
For publications that are currently unpublished or inpress, details are shown in italics.
Book (1 outputs)
Year  Citation  Altmetrics  Link  

2015 
Kamruzzaman M, Djenidi L, Antonia RA, Turbulent sheared mixing layer generated with a composite grid, FSSIC, China, China (2015)

Chapter (1 outputs)
Year  Citation  Altmetrics  Link  

2014 
Rajagopalan S, Lefeuvre N, Antonia RA, Djenidi L, 'Wake manipulation using control cylinders in a tandem arrangement', Lecture Notes in Mechanical Engineering 161166 (2014) The drag reduction phenomenon of a circular cylinder is investigated, using an Xwire probe, by placing a smaller diameter control cylinder of either circular or square crosssect... [more] The drag reduction phenomenon of a circular cylinder is investigated, using an Xwire probe, by placing a smaller diameter control cylinder of either circular or square crosssectional upstream of the main circular cylinder. The separation between the two cylinders was chosen so as to minimise the overall drag of the main cylinder. Although both configurations resulted in drag reduction, the square control cylinder yielded a bigger reduction and had a greater impact on the mean velocity and turbulent velocity fluctuations in the wake. Both control cylinders led to a reduction in the wake halfwidth. Spectra in the near wake did not indicate any suppression in vortex shedding.

Journal article (111 outputs)
Year  Citation  Altmetrics  Link  

2021 
Djenidi L, Antonia RA, Tang SL, 'Mathematical constraints on the scaling exponents in the inertial range of fluid turbulence', Physics of Fluids, 33 (2021) [C1] The dominant view in the theory of fluid turbulence assumes that, once the effect of the Reynolds number is negligible, moments of order n of the longitudinal velocity increment, ... [more] The dominant view in the theory of fluid turbulence assumes that, once the effect of the Reynolds number is negligible, moments of order n of the longitudinal velocity increment, (d u), can be described by a simple powerlaw r ¿ n, where the scaling exponent ¿n depends on n and, except for ¿ 3 (= 1), needs to be determined. In this Letter, we show that applying Hölder's inequality to the powerlaw form (d u) n ¯ ~ (r L) ¿ n (with r / L « 1; L is an integral length scale) leads to the following mathematical constraint: ¿ 2 p = p ¿ 2. When we further apply the CauchySchwarz inequality, a particular case of Hölder's inequality, to  (d u) 3 ¯  with ¿ 3 = 1, we obtain the following constraint: ¿ 2 = 2 / 3. Finally, when Hölder's inequality is also applied to the powerlaw form ( d u ) n ¯ ~ (r L) ¿ n (this form is often used in the extended selfsimilarity analysis) while assuming ¿ 3 = 1, it leads to ¿ 2 = 2 / 3. The present results show that the scaling exponents predicted by the 1941 theory of Kolmogorov in the limit of infinitely large Reynolds number comply with Hölder's inequality. On the other hand, scaling exponents, except for ¿3, predicted by current smallscale intermittency models do not comply with Hölder's inequality, most probably because they were estimated in finite Reynolds number turbulence. The results reported in this Letter should guide the development of new theoretical and modeling approaches so that they are consistent with the constraints imposed by Hölder's inequality.


2021 
Ghanadi F, Djenidi L, 'Reynolds number effect on the response of a rough wall turbulent boundary layer to local wall suction', Journal of Fluid Mechanics, 916 (2021) [C1] The combined effect of Reynolds number and localised wall suction applied through a porous strip on a fully rough wall turbulent boundary layer (TBL) is investigated using hotwir... [more] The combined effect of Reynolds number and localised wall suction applied through a porous strip on a fully rough wall turbulent boundary layer (TBL) is investigated using hotwire anemometry. The measurements show that the response of the TBL to suction is modulated by the ratio, where and are the suction and friction velocities, respectively. For example the suction impact on the mean velocity and the turbulence intensity profiles, which is felt across the boundary layer, decreases as decreases. Interestingly, the velocity spectra contour maps reveal that suction reduces the energy at all scales of motion across the boundary layer. Further, measurements of the velocity skewness indicate that the TBL undergoes a structural change when the ratio is relatively important. However, the measurements also reveal that TBL does not show a relaminarisation behaviour as it can be observed in a smooth wall TBL with similar localised wall suction. This lack of relaminarisation is due to the development of a growing internal boundary layer which evolves on a rough surface within the existing TBL.


2021 
Meldi M, Djenidi L, Antonia RA, 'Sensitivity analysis of the second and thirdorder velocity structure functions to the Reynolds number in decaying and forced isotropic turbulence using the EDQNM model', European Journal of Mechanics, B/Fluids, 88 229242 (2021) [C1] Numerical calculations based on a recent version of the eddydamped quasinormal model (EDQNMLMFA) are carried out for homogeneous isotropic turbulence (HIT) with the aim of inve... [more] Numerical calculations based on a recent version of the eddydamped quasinormal model (EDQNMLMFA) are carried out for homogeneous isotropic turbulence (HIT) with the aim of investigating the dependency on the Reynolds number of second and third order velocity structure functions. The quantities investigated include the energy spectrum E, the nonlinear energy transfer T as well as the second (S ) and third (S ) order moments of the longitudinal velocity increment. Both free decaying HIT and (steady state) forced HIT are considered. The analysis of the structure functions for Re ¿[50,10 ] indicates that, regardless of whether one considers decaying or forced HIT, the large scales affect S and S in the scaling range. In that range, forcing affects S and S differently. For forced HIT, S /(¿¯r) exhibits a distinct ¿bump¿ near the upper end of the scaling range while no such bump is seen for S /(¿¯r). The latter quantity remains approximately constant for values of r which extend to the scale corresponding to the forcing. For decaying HIT, there is no discernible bump in either S /(¿¯r) or S /(¿¯r). The slope of S in the scaling range approaches the theoretical value of 1, when Re is sufficiently large. However, at similar Re , the slope of S has not yet reached a constant for either decaying or forced HIT. 2 3 ¿ 2 3 2 3 2 3 2 3 3 ¿ ¿ 2 6 2/3 2/3


2020 
Tang SL, Antonia RA, Djenidi L, Zhou Y, 'Scaling of the turbulent energy dissipation correlation function', Journal of Fluid Mechanics, 891 (2020) [C1]


2020 
Mishra A, Yadav H, Djenidi L, Agrawal A, 'Experimental study of flow characteristics of an oblique impinging jet', Experiments in Fluids, 61 (2020) [C1]


2020 
Anika NN, Djenidi L, Tardu S, 'Roughness effect in an initially laminar channel flow', Journal of Fluid Mechanics, 892 (2020) [C1]


2020 
Djenidi L, Antonia RA, 'Assessment of largescale forcing in isotropic turbulence using a closed KarmanHowarth equation', Physics of Fluids, 32 (2020) [C1]


2020 
Lemay J, Djenidi L, Antonia R, 'Estimation of mean turbulent kinetic energy and temperature variance dissipation rates using a spectral chart method', Physics of Fluids, 32 (2020) [C1]


2019 
Djenidi L, Talluru KM, Antonia RA, 'A velocity defect chart method for estimating the friction velocity in turbulent boundary layers', FLUID DYNAMICS RESEARCH, 51 (2019) [C1]


2019 
Antonia RA, Tang SL, Djenidi L, Zhou Y, 'Finite Reynolds number effect and the 4/5 law', PHYSICAL REVIEW FLUIDS, 4 (2019) [C1]


2019 
Tang S, Antonia RA, Djenidi L, Zhou Y, 'Can smallscale turbulence approach a quasiuniversal state?', PHYSICAL REVIEW FLUIDS, 4 (2019) [C1]


2019 
Djenidi L, Antonia RA, Tang SL, 'Scale invariance in finite Reynolds number homogeneous isotropic turbulence', Journal of Fluid Mechanics, 864 244272 (2019) [C1]


2019 
Lemay J, Djenidi L, Antonia RA, Benaissa A, 'An empirical expression for epsilon(theta) on the axis of a slightly heated turbulent round jet', JOURNAL OF FLUID MECHANICS, 867 392413 (2019) [C1]


2019 
Djenidi L, Kamruzzaman M, Dostal L, 'Effects of wall suction on a 2D rough wall turbulent boundary layer', Experiments in Fluids, 60 (2019) [C1]


2018 
Kamruzzaman M, Djenidi L, Antonia RA, 'Behaviour of the energy dissipation coefficient in a rough wall turbulent boundary layer', Experiments in Fluids, 59 (2018) [C1]


2018 
Tang SL, Antonia RA, Djenidi L, Danaila L, Zhou Y, 'Reappraisal of the velocity derivative flatness factor in various turbulent flows', Journal of Fluid Mechanics, 847 244265 (2018) [C1]


2018 
Tang SL, Djenidi L, Antonia RA, Zhou Y, 'Secondary vortex street in the intermediate wake of a circular cylinder', Experiments in Fluids, 59 (2018) [C1]


2018 
Anika NN, Djenidi L, Tardu S, 'Bypass transition mechanism in a rough wall channel flow', PHYSICAL REVIEW FLUIDS, 3 (2018) [C1]


2018 
Meldi M, Djenidi L, Antonia R, 'Reynolds number effect on the velocity derivative flatness factor', JOURNAL OF FLUID MECHANICS, 856 426443 (2018) [C1]


2018 
Djenidi L, Talluru KM, Antonia RA, 'Can a turbulent boundary layer become independent of the Reynolds number?', JOURNAL OF FLUID MECHANICS, 851 (2018) [C1]


2017 
Djenidi L, Antonia RA, Danaila L, 'Selfpreservation relation to the Kolmogorov similarity hypotheses', PHYSICAL REVIEW FLUIDS, 2 (2017) [C1]


2017 
Djenidi L, Lefeuvre N, Kamruzzaman M, Antonia RA, 'On the normalized dissipation parameter Cepsilon in decaying turbulence', JOURNAL OF FLUID MECHANICS, 817 6179 (2017) [C1]


2017 
Tang SL, Antonia RA, Djenidi L, Danaila L, Zhou Y, 'Finite Reynolds number effect on the scaling range behaviour of turbulent longitudinal velocity structure functions', JOURNAL OF FLUID MECHANICS, 820 341369 (2017) [C1]


2017 
Antonia RA, Djenidi L, Danaila L, Tang SL, 'Small scale turbulence and the finite Reynolds number effect', PHYSICS OF FLUIDS, 29 (2017) [C1]


2017 
Djenidi L, Danaila L, Antonia RA, Tang S, 'A note on the velocity derivative flatness factor in decaying HIT', PHYSICS OF FLUIDS, 29 (2017) [C1]


2017 
Djenidi L, Antonia RA, Talluru MK, Abe H, 'Skewness and flatness factors of the longitudinal velocity derivative in wallbounded flows', PHYSICAL REVIEW FLUIDS, 2 (2017) [C1]


2016 
Djenidi L, Antonia RA, Lefeuvre N, Lemay J, 'Complete selfpreservation on the axis of a turbulent round jet', Journal of Fluid Mechanics, 790 5770 (2016) [C1] Selfpreservation (SP) solutions on the axis of a turbulent round jet are derived for the transport equation of the secondorder structure function of the turbulent kinetic energy... [more] Selfpreservation (SP) solutions on the axis of a turbulent round jet are derived for the transport equation of the secondorder structure function of the turbulent kinetic energy , which may be interpreted as a scalebyscale (s.b.s.) energy budget. The analysis shows that the mean turbulent energy dissipation rate, , evolves like ( is the streamwise direction). It is important to stress that this derivation does not use the constancy of the nondimensional dissipation rate parameter ( and are the integral length scale and root mean square of the longitudinal velocity fluctuation respectively). We show, in fact, that the constancy of is simply a consequence of complete SP (i.e. SP at all scales of motion). The significance of the analysis relates to the fact that the SP requirements for the mean velocity and mean turbulent kinetic energy (i.e. and respectively) are derived without invoking the transport equations for and . Experimental hotwire data along the axis of a turbulent round jet show that, after a transient downstream distance which increases with Reynolds number, the turbulence statistics comply with complete SP. For example, the measured agrees well with the SP prediction, i.e. , while the Taylor microscale Reynolds number remains constant. The analytical expression for the prefactor for (where is a virtual origin), first developed by Thiesset et al. (J. Fluid Mech., vol. 748, 2014, R2) and rederived here solely from the SP analysis of the s.b.s. energy budget, is validated and provides a relatively simple and accurate method for estimating along the axis of a turbulent round jet.


2016 
Tang SL, Antonia RA, Djenidi L, Zhou Y, 'Complete selfpreservation along the axis of a circular cylinder far wake', Journal of Fluid Mechanics, 786 253274 (2016) [C1]


2016 
Tang SL, Antonia RA, Djenidi L, Danaila L, Zhou Y, 'Boundedness of the mixed velocitytemperature derivative skewness in homogeneous isotropic turbulence', Physics of Fluids, 28 (2016) [C1] The transport equation for the mean scalar dissipation rate ¿ is derived by applyingthe limit at small separations to the generalized form of Yaglom's equation in twotypes o... [more] The transport equation for the mean scalar dissipation rate ¿ is derived by applyingthe limit at small separations to the generalized form of Yaglom's equation in twotypes of flows, those dominated mainly by a decay of energy in the streamwisedirection and those which are forced, through a continuous injection of energy atlarge scales. In grid turbulence, the imbalance between the production of ¿ dueto stretching of the temperature field and the destruction of ¿ by the thermaldiffusivity is governed by the streamwise advection of ¿ by the mean velocity.This imbalance is intrinsically different from that in stationary forced periodic boxturbulence (or SFPBT), which is virtually negligible. In essence, the different typesof imbalance represent different constraints imposed by the largescale motion on therelation between the socalled mixed velocitytemperature derivative skewness S and the scalar enstrophy destruction coefficient G in different flows, thus resultingin nonuniversal approaches of S towards a constant value as Re increases. Thedata for S collected in grid turbulence and in SFPBT indicate that the magnitudeof S is bounded, this limit being close to 0.5. ¿ ¿ ¿ ¿ T ¿ T ¿ T T


2016 
Tang SL, Antonia RA, Danaila L, Djenidi L, Zhou T, Zhou Y, 'Towards local isotropy of higherorder statistics in the intermediate wake', EXPERIMENTS IN FLUIDS, 57 (2016) [C1]


2016 
Talluru KM, Djenidi L, Kamruzzaman M, Antonia RA, 'Selfpreservation in a zero pressure gradient roughwall turbulent boundary layer', JOURNAL OF FLUID MECHANICS, 788 5769 (2016) [C1]


2015 
Tang SL, Djenidi L, Antonia RA, Zhou Y, 'Comparison between velocity and vorticitybased POD methods in a turbulent wake', Experiments in Fluids, 56 (2015) [C1] In this paper, the velocitybased POD and the vorticitybased POD have been systematically compared in three characteristic regions of the flow downstream of a twodimensional cir... [more] In this paper, the velocitybased POD and the vorticitybased POD have been systematically compared in three characteristic regions of the flow downstream of a twodimensional circular cylinder, namely the near, intermediate and far wakes. The twopoint space correlation function is used to determine which of the two methods is better suited for extracting the largescale flow structures based on the repartition of energy among the different POD modes. It is found that the POD, based on the lateral velocity fluctuation v, leads to the most optimum extraction in all three flow regions, while the vorticitybased POD is only effective in the near and intermediate wakes. Based on twopoint space correlation functions, a scenario is proposed for the application of POD to the present twodimensional wake.


2015 
Kamruzzaman M, Djenidi L, Antonia RA, Talluru KM, 'Scalebyscale energy budget in a turbulent boundary layer over a rough wall', International Journal of Heat and Fluid Flow, (2015) [C1] Hotwire velocity measurements are carried out in a turbulent boundary layer over a rough wall consisting of transverse circular rods, with a ratio of 8 between the spacing (w) of... [more] Hotwire velocity measurements are carried out in a turbulent boundary layer over a rough wall consisting of transverse circular rods, with a ratio of 8 between the spacing (w) of two consecutive rods and the rod height (k). The pressure distribution around the roughness element is used to accurately measure the mean friction velocity (Ut) and the error in the origin. It is found that Ut remained practically constant in the streamwise direction suggesting that the boundary layer over this surface is evolving in a selfsimilar manner. This is further corroborated by the similarity observed at all scales of motion, in the region 0.2=y/d=0.6, as reflected in the constancy of Reynolds number (R¿) based on Taylor's microscale and the collapse of Kolmogorov normalized velocity spectra at all wavenumbers.A scalebyscale budget for the secondorder structure function <(du)2> (du=u(x+r)u(x), where u is the fluctuating streamwise velocity component and r is the longitudinal separation) is carried out to investigate the energy distribution amongst different scales in the boundary layer. It is found that while the small scales are controlled by the viscosity, intermediate scales over which the transfer of energy (or <(du)3>) is important are affected by mechanisms induced by the largescale inhomogeneities in the flow, such as production, advection and turbulent diffusion. For example, there are nonnegligible contributions from the largescale inhomogeneity to the budget at scales of the order of ¿, the Taylor microscale, in the region of the boundary layer extending from y/d=0.2 to 0.6 (d is the boundary layer thickness).


2015 
Tang SL, Antonia RA, Djenidi L, Zhou Y, 'Transport equation for the isotropic turbulent energy dissipation rate in the farwake of a circular cylinder', Journal of Fluid Mechanics, 784 109129 (2015) [C1] The transport equation for the isotropic turbulent energy dissipation rate along the centreline in the farwake of a circular cylinder is derived by applying the limit at small se... [more] The transport equation for the isotropic turbulent energy dissipation rate along the centreline in the farwake of a circular cylinder is derived by applying the limit at small separations to the twopoint energy budget equation. It is found that the imbalance between the production and the destruction of e , respectively due to vortex stretching and viscosity, is governed by both the streamwise advection and the lateral turbulent diffusion (the former contributes more to the budget than the latter). This imbalance differs intrinsically from that in other flows, e.g. grid turbulence and the flow along the centreline of a fully developed channel, where either the streamwise advection or the lateral turbulent diffusion of e governs the imbalance. More importantly, the different types of imbalance represent different constraints on the relation between the skewness of the longitudinal velocity derivative and the destruction coefficient of enstrophy G. This results in a nonuniversal approach of towards a constant value as the Taylor microscale Reynolds number R increases. For the present flow, the magnitude of S decreases initially before increasing (R > 40) towards this constant value. The constancy of S at large R violates the modified similarity hypothesis introduced by Kolmogorov (J. Fluid Mech., vol. 13, 1962, pp. 8285) but is consistent with the original similarity hypotheses (Kolmogorov, Dokl. Akad. Nauk SSSR, vol. 30, 1941b, pp. 299303 (see also 1991 Proc. R. Soc. Lond. A, vol. 434, pp. 913)) , and, more importantly, with the almost completely selfpreserving nature of the plane farwake. iso iso ¿ ¿ ¿


2015 
Leonardi S, Orlandi P, Djenidi L, Antonia RA, 'Heat transfer in a turbulent channel flow with square bars or circular rods on one wall', Journal of Fluid Mechanics, 776 512530 (2015) [C1] Direct numerical simulations (DNS) are carried out to study the passive heat transport in a turbulent channel flow with either square bars or circular rods on one wall. Several va... [more] Direct numerical simulations (DNS) are carried out to study the passive heat transport in a turbulent channel flow with either square bars or circular rods on one wall. Several values of the pitch to height ratio and two Reynolds numbers are considered. The roughness increases the heat transfer by inducing ejections at the leading edge of the roughness elements. The amounts of heat transfer and mixing depend on the separation between the roughness elements, an increase in heat transfer accompanying an increase in drag. The ratio of nondimensional heat flux to the nondimensional wall shear stress is higher for circular rods than square bars irrespectively of the pitch to height ratio. The turbulent heat flux varies within the cavities and is larger near the roughness elements. Both momentum and thermal eddy diffusivities increase relative to the smooth wall. For square cavities the turbulent Prandtl number is smaller than for a smooth channel near the wall. As increases, the turbulent Prandtl number increases up to a maximum of 2.5 at the crests plane of the square bars . With increasing distance from the wall, the differences with respect to the smooth wall vanish and at three roughness heights above the crests plane, the turbulent Prandtl number is essentially the same for smooth and rough walls.


2015 
Tang SL, Antonia RA, Djenidi L, Abe H, Zhou T, Danaila L, Zhou Y, 'Transport equation for the mean turbulent energy dissipation rate on the centreline of a fully developed channel flow', Journal of Fluid Mechanics, 777 151177 (2015) [C1] The transport equation for the mean turbulent energy dissipation rate along the centreline of a fully developed channel flow is derived by applying the limit at small separations ... [more] The transport equation for the mean turbulent energy dissipation rate along the centreline of a fully developed channel flow is derived by applying the limit at small separations to the twopoint budget equation. Since the ratio of the isotropic energy dissipation rate to the mean turbulent energy dissipation rate is sufficiently close to 1 on the centreline, our main focus is on the isotropic form of the transport equation. It is found that the imbalance between the production of due to vortex stretching and the destruction of caused by the action of viscosity is governed by the diffusion of by the wallnormal velocity fluctuation. This imbalance is intrinsically different from the advectiondriven imbalance in decayingtype flows, such as grid turbulence, jets and wakes. In effect, the different types of imbalance represent different constraints on the relation between the skewness of the longitudinal velocity derivative and the destruction coefficient of enstrophy in different flows, thus resulting in nonuniversal approaches of towards a constant value as the Taylor microscale Reynolds number, , increases. For example, the approach is slower for the measured values of along either the channel or pipe centreline than along the axis in the selfpreserving region of a round jet. The data for collected in different flows strongly suggest that, in each flow, the magnitude of is bounded, the value being slightly larger than 0.5.


2015 
Djenidi L, Antonia RA, 'A general selfpreservation analysis for decaying homogeneous isotropic turbulence', Journal of Fluid Mechanics, 773 345365 (2015) [C1] A general framework of selfpreservation (SP) is established, based on the transport equation of the secondorder longitudinal velocity structure function in decaying homogeneous ... [more] A general framework of selfpreservation (SP) is established, based on the transport equation of the secondorder longitudinal velocity structure function in decaying homogeneous isotropic turbulence (HIT). The analysis introduces the skewness of the longitudinal velocity increment, S(r, t) (r and t are space increment and time), as an SP controlling parameter. The present SP framework allows a critical appraisal of the specific assumptions that have been made in previous SP analyses. It is shown that SP is achieved when S(r, t) varies in a selfsimilar manner, i.e. S=c(t)f(r/l) where l is a scaling length, and c(t) and f(r/l) are dimensionless functions of time and (r/l), respectively. When c(t) is constant, l can be identified with the Kolmogorov length scale ¿, even when the Reynolds number is relatively small. On the other hand, the Taylor microscale ¿ is a relevant SP length scale only when certain conditions are met. The decay law for the turbulent kinetic energy (k) ensuing from the present SP is a generalization of the existing laws and can be expressed as k ~ (tt<inf>0</inf>)<sup>n</sup>+B, where B is a constant representing the energy of the motions whose scales are excluded from the SP range of scales. When B = 0, SP is achieved at all scales of motion and ¿ becomes a relevant scaling length together with ¿. The analysis underlines the relation between the initial conditions and the powerlaw exponent n and also provides a link between them. In particular, an expression relating n to the initial values of the scaling length and velocity is developed. Finally, the present SP analysis is consistent with both experimental grid turbulence data and the eddydamped quasinormal Markovian numerical simulation of decaying HIT by Meldi & Sagaut (J. Turbul., vol. 14, 2013, pp. 2453).


2015 
Djenidi L, Kamruzzaman M, Antonia RA, 'Powerlaw exponent in the transition period of decay in grid turbulence', JOURNAL OF FLUID MECHANICS, 779 (2015) [C1]


2015 
Kamruzzaman M, Djenidi L, Antonia RA, Talluru KM, 'Drag of a turbulent boundary layer with transverse 2D circular rods on the wall', EXPERIMENTS IN FLUIDS, 56 (2015) [C1]


2015 
Antonia RA, Tang SL, Djenidi L, Danaila L, 'Boundedness of the velocity derivative skewness in various turbulent flows', Journal of Fluid Mechanics, 781 727744 (2015) [C1] The variation of S, the velocity derivative skewness, with the Taylor microscale Reynolds number Re is examined for different turbulent flows by considering the locally isotropic... [more] The variation of S, the velocity derivative skewness, with the Taylor microscale Reynolds number Re is examined for different turbulent flows by considering the locally isotropic form of the transport equation for the mean energy dissipation rate e¯ . In each flow, the equation can be expressed in the form S C 2G=Re D C=Re , where G is a nondimensional rate of destruction of e¯ and C is a flowdependent constant. Since 2G=Re is found to be very nearly constant for Re = 70, S should approach a universal constant when Re is sufficiently large, but the way this constant is approached is flow dependent. For example, the approach is slow in grid turbulence and rapid along the axis of a round jet. For all the flows considered, the approach is reasonably well supported by experimental and numerical data. The constancy of S at large Re has obvious ramifications for smallscale turbulence research since it violates the modified similarity hypothesis introduced by Kolmogorov (J. Fluid Mech., vol. 13, 1962, pp. 8285) but is consistent with the original similarity hypothesis (Kolmogorov, Dokl. Akad. Nauk SSSR, vol. 30, 1941, pp. 299303). ¿ iso ¿ ¿ iso ¿ ¿ ¿ ¿


2014 
Thiesset F, Antonia RA, Djenidi L, 'Consequences of selfpreservation on the axis of a turbulent round jet', JOURNAL OF FLUID MECHANICS, 748 (2014) [C1]


2014 
Djenidi L, Antonia RA, 'Transport equation for the mean turbulent energy dissipation rate in lowRlambda grid turbulence', JOURNAL OF FLUID MECHANICS, 747 288315 (2014) [C1]


2014 
Lee SK, Djenidi L, Antonia RA, 'Empirical correlations for slightly heated decaying passivegrid turbulence', Heat Transfer Engineering, 35 14821490 (2014) [C1] For homogeneous isotropic turbulence approximated by grid turbulence, velocity and temperature fluctuations decay under the effects of viscosity and thermal diffusivity of the flu... [more] For homogeneous isotropic turbulence approximated by grid turbulence, velocity and temperature fluctuations decay under the effects of viscosity and thermal diffusivity of the fluid. In the selfsimilar region of grid flow, there is no mean shear and no turbulence production, and the decay rate is well represented by a power law; this is supported by the present measurements in three different grid flows and by previously published data for passivegrid turbulence obtained over different ranges of streamwise distance and/or Reynolds number. The grid flow is slightly heated so that temperature acts as a passive scalar. From dimensional analysis and empirical powerlaw correlations, relations for basic flow parameters, such as the Kolmogorov, Taylor, and Corrsin microscales, and the Reynolds and Péclet numbers, are established as functions of the normalized streamwise distance downstream of the grid. With these relations, it is possible to determine the flow parameters for a specific passivegrid geometry or, more generally, a specific set of initial conditions. © 2014 Copyright Taylor & Francis Group, LLC.


2014 
Djenidi L, Antonia RA, Amielh M, Anselmet F, 'Use of PIV to highlight possible errors in hotwire Reynolds stress data over a 2D rough wall', EXPERIMENTS IN FLUIDS, 55 (2014) [C1]


2014 
Lefeuvre N, Thiesset F, Djenidi L, Antonia RA, 'Statistics of the turbulent kinetic energy dissipation rate and its surrogates in a square cylinder wake flow', Physics of Fluids, 26 (2014) [C1] A numerical simulation based on the lattice Boltzmann method is carried out in the wake of a square cylinder with the view to investigating possible surrogates for the instantaneo... [more] A numerical simulation based on the lattice Boltzmann method is carried out in the wake of a square cylinder with the view to investigating possible surrogates for the instantaneous turbulent kinetic energy dissipation rate, Ie{cyrillic, ukrainian}, as well as its mean value, \documentclass[12pt]{minimal}\begin{document}$\overline{\epsilon }$\end{document}Ie{cyrillic, ukrainian}. Various surrogate approximations of Ie{cyrillic, ukrainian}, based on local isotropy (Ie{cyrillic, ukrainian} ), local axisymmetry along the streamwise direction x (Ie{cyrillic, ukrainian} ) and the transverse direction y (Ie{cyrillic, ukrainian} ), local homogeneity (Ie{cyrillic,ukrainian} ), and homogeneity in the transverse plane, (Ie{cyrillic,ukrainian} ), are assessed. All the approximations are in agreement with \documentclass[12pt]{minimal}\begin{document}$\overline{\epsilon }$\end{document}Ie{cyrillic,ukrainian}when the distance downstream of the obstacle is larger than about 40 diameters. Closer to the obstacle, the agreement remains reasonable only for \documentclass[12pt]{minimal}\begin{document}$\overline{\epsilon }_{a,x}$\end{document}Ie{cyrillic, ukrainian}a,x, \documentclass[12pt]{minimal}\begin{document}$\overline{\epsilon }{hom}$\end{document}?hom and \documentclass[12pt]{minimal}\begin{document}$\overline{\epsilon }{4x}$\end{document}Ie{cyrillic, ukrainian}4x. The probability density functions (PDF) and joint PDFs of Ie{cyrillic, ukrainian} and its surrogates show that Ie{cyrillic, ukrainian} correlates best withIe{cyrillic, ukrainian}while ? and Ie{cyrillic, ukrainian} present the smallest correlation. The results indicate that Ie{cyrillic, ukrainian} is a very good surrogate for Ie{cyrillic, ukrainian}and can be used for correctly determining the behaviour of Ie{cyrillic, ukrainian}. iso a, x a, y hom 4x 4x iso hom 4x


2014 
Antonia RA, Djenidi L, Danaila L, 'Collapse of the turbulent dissipative range on Kolmogorov scales', PHYSICS OF FLUIDS, 26 (2014) [C1]


2014 
Thiesset F, Schaeffer V, Djenidi L, Antonia RA, 'On selfpreservation and logsimilarity in a slightly heated axisymmetric mixing layer', PHYSICS OF FLUIDS, 26 (2014) [C1]


2014 
Djenidi L, Tardu SF, Antonia RA, Danaila L, 'Breakdown of Kolmogorov's first similarity hypothesis in grid turbulence', JOURNAL OF TURBULENCE, 15 596610 (2014) [C1]


2013 
Antonia RA, Lee SK, Djenidi L, Lavoie P, Danaila L, 'Invariants for slightly heated decaying grid turbulence', JOURNAL OF FLUID MECHANICS, 727 379406 (2013) [C1]


2013 
Rajagopalan S, Antonia RA, Djenidi L, 'Effect of mesh grids on the turbulent mixing layer of an axisymmetric jet', Heat Transfer Engineering, 34 12161225 (2013) [C1] This article focuses on the effect that two different mesh grids have on the structure of the mixing layer of an axisymmetric jet. Detailed measurements of mean velocity and turbu... [more] This article focuses on the effect that two different mesh grids have on the structure of the mixing layer of an axisymmetric jet. Detailed measurements of mean velocity and turbulent velocity fluctuations are made with an X hotwire probe in the range 0.5 = x/d = 10, where x is the longitudinal distance from the nozzle exit plane and d is the nozzle diameter. The grids are introduced at two locationsone location just downstream of the nozzle exit plane and the other location upstream of the nozzle exit plane in order to perturb the nozzle exit boundary layer. One mesh completely covers the nozzle (full mesh or FM) and the other mesh covers the central, highspeed zone (disk mesh or DM). With reference to the undisturbed jet, FM yields a significant reduction in the turbulence intensity and width of the shear layer, whereas DM enhances the turbulence intensity and increases the width of the shear layer. Both grids suppress the formation of the KelvinHelmholtz instability in the mixing layer. Results are presented, mainly at x/d = 5 and 6 in both the spectral domain and physical space. In the latter context, secondand thirdorder structure functions associated with u (the longitudinal velocity fluctuation) and v (the lateral or radial velocity fluctuation) are presented only for the flow perturbed by placing the mesh outside the nozzle. All mesh geometries have a more significant effect on the secondorder structure function of u than on that of v. The thirdorder energy transfer term is affected in such a way that, relative to the undisturbed jet, its peak location is shifted to a smaller scale when FM is used and to a larger scale with DM. This is consistent with our observations that FM reduces the turbulence in the shear layer while DM enhances it. It is suggested that the largescale vortices that are formed at the edge of the grids play a significant role in the transfer of energy. © 2013 Taylor & Francis Group, LLC.


2013 
Djenidi L, Tardu SF, Antonia RA, 'Relationship between temporal and spatial averages in grid turbulence', Journal of Fluid Mechanics, 730 593606 (2013) [C1]


2013 
Thiesset F, Antonia RA, Danaila L, Djenidi L, 'KarmanHowarth closure equation on the basis of a universal eddy viscosity', PHYSICAL REVIEW E, 88 (2013) [C1]


2013 
Kamruzzaman M, Wahiduzzaman M, Alam MM, Djenidi L, 'The effects of magnetic field on the fluid flow through a rotating straight duct with large aspect ratio', Procedia Engineering, 56 239244 (2013) [C1] This paper presents a numerical study of an investigation of a fluid flow through a rotating rectangular straight duct in the presence of magnetic field. The straight duct of rect... [more] This paper presents a numerical study of an investigation of a fluid flow through a rotating rectangular straight duct in the presence of magnetic field. The straight duct of rectangular crosssection rotates at a constant angular velocity about the centre of the duct crosssection is same as the axis of the magnetic field along the positive direction in the stream wise direction of the flows. Numerical calculation is based on the Magneto hydrodynamics incompressible viscous steady fluid model whereas Spectral method is applied as a main tool. Flow depends on the Magnetic parameter, Dean number and Taylor number. One of the interesting phenomena of the fluid flow is the solution curve and the flow structures in case of rotation of the duct axis. The calculation are carried out for 5 = M = 50000, 50 = T 100000, D 500, 1000, 1500 and 2000 where the aspect ratio ¿ 3.0. The maximum axial flow will be shifted to the centre from the wall and turn into the ring shape under the effects of high magnetic parameter and large Taylor number whereas the fluid particles strength is weak. © 2013 The Authors. Published by Elsevier Ltd. g r n


2012 
Djenidi L, Tardu SF, 'On the anisotropy of a lowReynoldsnumber grid turbulence', Journal of Fluid Mechanics, 702 332353 (2012) [C1]


2012 
Djenidi L, Antonia RA, 'A spectral chart method for estimating the mean turbulent kinetic energy dissipation rate', Experiments in Fluids, 53 10051013 (2012) [C1]


2012 
Lee SK, Benaissa A, Djenidi L, Lavoie P, Antonia RA, 'Decay of passivescalar fluctuations in slightly stretched grid turbulence', Experiments in Fluids, 53 909923 (2012) [C1]


2012 
Lee SK, Benaissa A, Djenidi L, Lavoie P, Antonia RA, 'Scaling range of velocity and passive scalar spectra in grid turbulence', Physics of Fluids, 24 (2012) [C1]


2011 
Lefeuvre N, Djenidi L, Tardu S, 'Momentum and scalar transport in a localised synthetic turbulence in a channel flow with a short contraction', Journal of Physics: Conference Series, 318 (2011) [C1]


2010 
Agrawal A, Djenidi L, Antonia RA, 'Nearfield measurements and development of a new boundary layer over a flat plate with localized suction', Experiments in Fluids, 48 747762 (2010) [C1]


2010 
Antonia RA, Lavoie P, Djenidi L, Benaissa A, 'Effect of a small axisymmetric contraction on grid turbulence', Experiments in Fluids, 49 310 (2010) [C1]


2009 
Djenidi L, Antonia RA, 'Momentum and heat transport in a threedimensional transitional wake of a heated square cylinder', Journal of Fluid Mechanics, 640 109129 (2009) [C1]


2009 
Agrawal A, Djenidi L, Agrawal A, 'Simulation of gas flow in microchannels with a single 90 degrees bend', Computers & Fluids, 38 16291637 (2009) [C1]


2009 
Djenidi L, Agrawal A, Antonia RA, 'Anisotropy measurements in the boundary layer over a flat plate with suction', Experimental Thermal and Fluid Science, 33 11061111 (2009) [C1]


2008 
Djenidi L, 'Structure of a turbulent crossbar nearwake studied by means of lattice Boltzmann simulation', Physical Review E, 77 (2008) [C1]


2008 
Oyewola O, Djenidi L, Antonia RA, 'Response of mean turbulent energy dissipation rate and spectra to concentrated wall suction', Experiments in Fluids, 44 159165 (2008) [C1]


2008 
Djenidi L, Antonia RA, Amielh M, Anselmet F, 'A turbulent boundary layer over a twodimensional rough wall', Experiments in Fluids, 44 3747 (2008) [C1]


2007 
Oyewola O, Djenidi L, Antonia RA, 'Influence of localised double suction on a turbulent boundary layer', Journal of Fluids and Structures, 23 787798 (2007) [C1]


2007 
Oyewola MO, Djenidi L, Antonia RA, 'Examination of anisotropy of the smallscale motion in a perturbed low Reynolds number turbulent boundary layer', Experimental Thermal and Fluid Science, 32 309315 (2007) [C1]


2007 
Benaissa A, Djenidi L, Antonia RA, Parker R, 'Effect of initial conditions on the scalar decay in grid turbulence at low R Decaying grid turbulence is considered at low Reynolds number (R ~ 50) for different initial conditions. Three different grid geometries are used. Heat is injected via a mandolin... [more] Decaying grid turbulence is considered at low Reynolds number (R ~ 50) for different initial conditions. Three different grid geometries are used. Heat is injected via a mandoline at a distance of 1.5 M from the grid. The amount of heating is such that temperature may be treated as a passive scalar. A small contraction (1.36:1) is added at a distance of 11M downstream of the grid. The powerlaw exponents for the scalar variance are compared with those for the turbulent kinetic energy. These exponents depend on the grid geometry. For the isotropic dissipation rate (Chi;) , the powerlaw exponent agrees with that inferred from the temperature variance transport equation. Restricting the range of validity of the decay law affects the magnitudes of the origin and decay exponent. Secondorder temperature structure functions collapse when the normalization is based on the local temperature variance and the Corrsin microscale but the asymptotic form of this collapse depends on the initial conditions. ¿ iso


2007 
Lavoie PLD, Djenidi L, Antonia RA, 'Effects of initial conditions in decaying turbulence generated by passive grids', Journal of Fluid Mechanics, 585 395420 (2007) [C1]


2006 
Djenidi L, 'LatticeBoltzmann simulation of gridgenerated turbulence', Journal of Fluid Mechanics, 552 1335 (2006) [C1]


2006 
Djenidi L, Moghtaderi B, 'Numerical investigation of laminar mixing in a coaxial microreactor', Journal of Fluid Mechanics, 568 223242 (2006) [C1]


2006 
Moghtaderi B, Shames I, Djenidi L, 'Microfluidic characteristics of a multiholed baffle plate microreactor', International Journal of Heat and Fluid Flow, 27 10691077 (2006) [C1]


2006 
Burattini P, Lavoie P, Agrawal A, Djenidi L, Antonia RA, 'Power law of decaying homogeneous isotropic turbulence at low Reynolds number.', Phys Rev E Stat Nonlin Soft Matter Phys, 73 066304 (2006)


2006 
Agrawal A, Djenidi L, Antonia RA, 'Investigation of flow around a pair of sidebyside square cylinders using the lattice Boltzmann method', Computers and Fluids, 35 10931107 (2006) [C1]


2006 
Leonardi S, Orlandi P, Djenidi L, Antonia RA, 'Guidelines for modeling a 2D rough wall channel flow', Flow Turbulence and Combustion, 77 4157 (2006) [C1]


2006 
Burattini P, Lavoie PLD, Agrawal A, Djenidi L, Antonia RA, 'Power law of decaying homogeneous isotropic turbulence at low Reynolds number', Physical Review E, 73 (2006) [C1]


2005 
Oyewola O, Djenidi L, Antonia RA, 'Spanwise vorticity measurements in a perturbed boundary layer', Experiments in Fluids, 39 152155 (2005) [C1]


2005 
Lavoie PLD, Burattini P, Djenidi L, Antonia RA, 'Effect of initial conditions on decaying grid turbulence at low Rgimel', Experiments in Fluids, 39 865874 (2005) [C1]


2005 
Agrawal A, Djenidi L, Antonia RA, 'Simulation of gas flow in microchannels with a sudden expansion or contraction', Journal of Fluid Mechanics, 530 135144 (2005) [C1]


2004 
Oyewola O, Djenidi L, Antonia RA, 'The response of a turbulent boundary layer to concentrated suction applied through a pair of porous wall strips', Journal of Fluids Engineereing, 126 888890 (2004) [C1]


2004 
Leonardi S, Orlandi P, Djenidi L, Antonia RA, 'Structure of turbulent channel flow with square bars on one wall', International Journal of Heat and Fluid Flow, 25 384392 (2004) [C1]


2004 
Oyewola O, Djenidi L, Antonia RA, 'Influence of localised wall suction on the anisotropy of the Reynolds stress tensor in a turbulent boundary layer', Experiments in Fluids, 37 187193 (2004) [C1]


2004 
Agrawal A, Djenidi L, Antonia RA, 'LIF based detection of lowspeed streaks', experiments in fluids, 36 600603 (2004) [C1]


2004 
Burattini P, Djenidi L, 'Velocity and passive scalar characteristics in a round jet with grids at the nozzle exit', Flow, Turbulence and Combustion, 72 199218 (2004) [C1]


2003 
Djenidi L, Antonia RA, Savill AM, 'A numerical study of drag reduction by minibelts in a smooth wall turbulent boundary layer', The Aeronautical Journal, Paper No.2728 (2003) [C1]


2003 
Leonardi S, Orlandi P, Smalley RJ, Djenidi L, Antonia RA, 'Direct numerical simulations of turbulent channel flow with transverse square bars on one wall', Journal of Fluid Mechanics, 491 229238 (2003) [C1]


2003 
Oyewola O, Djenidi L, Antonia RA, 'Combined influence of the Reynolds number and localised wall suction on a turbulent boundary layer', Experiments in Fluids, 35 199206 (2003) [C1]


2002 
Smalley RJ, Leonardi S, Antonia RA, Djenidi L, Orlandi P, 'Reynolds stress anistropy of turbulent rough wall layers', Experiments in Fluids, 33 3137 (2002) [C1]


2001 
Djenidi L, Antonia RA, 'Calculation of the effect of concentrated wall suction on a turbulent boundary layer using a secondorder moment closure', International Journal of Heat and Fluid Flow, 22 487494 (2001) [C1]


2001 
Rehab H, Antonia RA, Djenidi L, 'Steamwise evloution of a highSchmidtnumber passive scalar in a turbulent plane wake', Experiments in Fluids, 31 186192 (2001) [C1]


2001 
Smalley RJ, Antonia RA, Djenidi L, 'Selfpreservation of roughwall turbulent boundary layers', European Journal of Mechanics BFluids, 20 591602 (2001) [C1]


2000 
Rehab H, Antonia RA, Djenidi L, Mi J, 'Characteristics of fluorescein dye and temperature fluctuations in a turbulent nearwake', Experiments in Fluids, 28 462470 (2000) [C1]


1999 
Djenidi L, Elavarasan R, Antonia RA, 'The Turbulent Boundary Layer Over Transverse Square Cavities', Journal of Fluid Mechanics, 395 271294 (1999) [C1]


1998 
Djenidi L, Antonia RA, Hundseid J, Krogstad PA, 'Combined Effect of Wall Suction and Riblets on a Low R Turbulent Boundary Layer', The Aeronautical Journal, 102 5357 (1998) [C1]


Show 108 more journal articles 
Conference (81 outputs)
Year  Citation  Altmetrics  Link  

2020 
Djenidi L, Antonia RA, Tardu S, 'Breakdown of Kolmogorov's scaling in grid turbulence', ETC 2013  14th European Turbulence Conference (2020) Copyright © ETC 2013  14th European Turbulence Conference.All rights reserved. A direct numerical simulation (DNS) based on the lattice Boltzmann method is carried out for decayi... [more] Copyright © ETC 2013  14th European Turbulence Conference.All rights reserved. A direct numerical simulation (DNS) based on the lattice Boltzmann method is carried out for decaying grid turbulence at low Reynolds numbers with the view to investigating possible departures from Kolmogorov scaling. 1D and 3D spectra show that the Kolmogorov scaling is no longer valid when the Reynolds number falls below a certain value. The results are in agreement with the low Reynolds number DNS in a 3D periodic box by Mansour and Wray [1]. We are now investigating possible departures from local isotropy when the Kolmogorov scaling breaks down.


2019 
Antonia RA, Tang SL, Danaila L, Djenidi L, Zhou Y, 'K41 versus k62: Recent developments', FluidStructureSound Interactions and Control Proceedings of the 4th Symposium on FluidStructureSound Interactions and Control, Tokyo, Japan (2019) [E1]


2019 
Kamruzzaman M, Djenidi L, Antonia RA, 'Scalebyscale assessment of the effects of mean shear on the energy budget in decaying turbulence', 11th International Symposium on Turbulence and Shear Flow Phenomena, TSFP 2019, Southampton, UK (2019) [E1]


2019 
Anika NN, Djenidi L, 'Electroosmotic effects on rough wall microchannel flow', Modelling and Simulation in Science, Technology and Engineering Mathematics Proceedings of the International Conference on Modelling and Simulation (MS17)., Kolkata, India (2019) [E1]


2019 
Tang SL, Djenidi L, Antonia RA, Zhou Y, 'Reappraisal of the k  e model constants for the wake of a circular cylinder', 11th International Symposium on Turbulence and Shear Flow Phenomena, TSFP 2019, Southampton, UK (2019) [E1]


2018 
Djenidi L, Antonia RA, Tang S, 'Realisability condition for the velocity structure function in the scaling range of turbulent flows', Proceedings of the 21st Australasian Fluid Mechanics Conference, AFMC 2018 (2018) © 2018 Australasian Fluid Mechanics Society. All rights reserved. Realisability conditions based on the CauchySchwarz inequality are developed for the moments of the longitudinal... [more] © 2018 Australasian Fluid Mechanics Society. All rights reserved. Realisability conditions based on the CauchySchwarz inequality are developed for the moments of the longitudinal velocity structure function, (du(r))n (du(r) = u(x,t)  u(x,+r,t)), for homogeneous isotropic turbulence in the inertial range, when they are assumed to follow a powerlaw form (~ r¿n). While these conditions cannot be used to assess the validity of any phenomenology behind the development of scaling laws in the form (du)n ~ r¿n, they provide a simple and objective way to assess the realisability of the exponent ¿n. In particular, they can also be used to assess the realisability of ¿n obtained empirically from either experimental or numerical data. Application of these realisability conditions to existing data shows that the estimated exponents ¿n as well as multifractal model expressions of ¿n are not realisable. Interestingly, the ßmodel and the Kolmogorov prediction (i.e. ¿n = n/3) are both realisable, but only the latter is Reynolds number independent. This is expected since it is valid when the Reynolds number is infinitely large.


2018 
Djenidi L, Antonia RA, Tang S, 'Realisability condition for the velocity structure function in the scaling range of turbulent flows', Proceedings of the 21st Australasian Fluid Mechanics Conference, AFMC 2018 (2018) Realisability conditions based on the CauchySchwarz inequality are developed for the moments of the longitudinal velocity structure function, (du(r)) (du(r) = u(x,t)  u(x,+r,t)... [more] Realisability conditions based on the CauchySchwarz inequality are developed for the moments of the longitudinal velocity structure function, (du(r)) (du(r) = u(x,t)  u(x,+r,t)), for homogeneous isotropic turbulence in the inertial range, when they are assumed to follow a powerlaw form (~ r ). While these conditions cannot be used to assess the validity of any phenomenology behind the development of scaling laws in the form (du) ~ r , they provide a simple and objective way to assess the realisability of the exponent ¿ . In particular, they can also be used to assess the realisability of ¿ obtained empirically from either experimental or numerical data. Application of these realisability conditions to existing data shows that the estimated exponents ¿ as well as multifractal model expressions of are not realisable. Interestingly, the ßmodel and the Kolmogorov prediction (i.e. ¿ = n/3) are both realisable, but only the latter is Reynolds number independent. This is expected since it is valid when the Reynolds number is infinitely large. n ¿n n ¿n n n n ¿n n


2016 
Djenidi L, Kamruzzaman M, Antonia RA, 'Energy dissipation rate parameter in a rough wall turbulent boundary layer', Proceedings of the 20th Australasian Fluid Mechanics Conference, AFMC 2016 (2016) © 2006 Australasian Fluid Mechanics Society. All rights reserved. The dimensionless mean energy dissipation rate parameter Ce is measured in a fully rough wall turbulent boundary ... [more] © 2006 Australasian Fluid Mechanics Society. All rights reserved. The dimensionless mean energy dissipation rate parameter Ce is measured in a fully rough wall turbulent boundary layer at several Reynolds numbers using hotwire anemometry. The study aims to determine the dependence of Ce = eL/u'3 on the distance from the wall and the Reynolds number. The results shows that Ce decreases as the distance from the wall increases and reaches a minimum value, which appears to be independent of the Reynolds number. Further, this value, which is about 0.40.5, is the same as in homogeneous isotropic turbulence at high Reynolds numbers. This lends support to the possibility that a universal value for Ce at large Reynolds numbers cannot be ruled out.


2016 
Tang SL, Lefeuvre N, Djenidi L, Antonia RA, Zhou Y, 'Turbulent Kinetic Energy Budget in the Far Field of a Square Cylinder Wake', FLUIDSTRUCTURESOUND INTERACTIONS AND CONTROL, Perth, AUSTRALIA (2016) [E1]


2016 
Kamruzzaman M, Djenidi L, Antonia RA, 'Turbulent Sheared Mixing Layer Generated with a Composite Grid', FLUIDSTRUCTURESOUND INTERACTIONS AND CONTROL, Perth, AUSTRALIA (2016) [E1]


2016 
Djenidi L, Kamruzzaman M, Antonia RA, 'Energy dissipation rate parameter in a rough wall turbulent boundary layer', Proceedings of the 20th Australasian Fluid Mechanics Conference, AFMC 2016 (2016) The dimensionless mean energy dissipation rate parameter C is measured in a fully rough wall turbulent boundary layer at several Reynolds numbers using hotwire anemometry. The s... [more] The dimensionless mean energy dissipation rate parameter C is measured in a fully rough wall turbulent boundary layer at several Reynolds numbers using hotwire anemometry. The study aims to determine the dependence of C = eL/u' on the distance from the wall and the Reynolds number. The results shows that C decreases as the distance from the wall increases and reaches a minimum value, which appears to be independent of the Reynolds number. Further, this value, which is about 0.40.5, is the same as in homogeneous isotropic turbulence at high Reynolds numbers. This lends support to the possibility that a universal value for C at large Reynolds numbers cannot be ruled out. e e e e 3


2016 
Tang SL, Antonia RA, Djenidi L, Danaila L, Zhou Y, 'Boundedness of the velocity derivative flatness factor in a turbulent plane jet', Proceedings of the 20th Australasian Fluid Mechanics Conference, AFMC 2016 (2016) This paper focuses on the statistics of normalized fourthorder moment of the longitudinal velocity derivative, ¿u/¿x, i.e. the flatness factor S = (¿u/¿x) /(¿u/¿x) on the axis ... [more] This paper focuses on the statistics of normalized fourthorder moment of the longitudinal velocity derivative, ¿u/¿x, i.e. the flatness factor S = (¿u/¿x) /(¿u/¿x) on the axis of a plane jet over a range of Taylor microscale Reynolds number varying between R ' 500 and 1100. The aim is to determine the dependence of S on R . Different tests on the jet axis show that local isotropy is closely satisfied, allowing the use of e , the locally isotropic form of the mean turbulent kinetic energy dissipation rate e. The measurements show that S remains approximately constant when R = 500. This is inconsistent S ~ R , where a is a small positive number, as predicted by various internal intermittency models. The constancy of S is in full agreement with the relatively recent results (6) showing that S , the skewness of ¿u/¿x, also tends to a constant when R increases. The present results conform with the original similarity hypotheses of Kolmogorov (1). 4 ¿ 4 ¿ iso 4 ¿ 4 ¿ 4 3 ¿ 4 22 a


2016 
Djenidi L, Kamruzzaman M, Antonia RA, 'Energy dissipation rate parameter in a rough wall turbulent boundary layer', Proceedings of the 20th Australasian Fluid Mechanics Conference, AFMC 2016 (2016) © 2006 Australasian Fluid Mechanics Society. All rights reserved. The dimensionless mean energy dissipation rate parameter Ce is measured in a fully rough wall turbulent boundary ... [more] © 2006 Australasian Fluid Mechanics Society. All rights reserved. The dimensionless mean energy dissipation rate parameter Ce is measured in a fully rough wall turbulent boundary layer at several Reynolds numbers using hotwire anemometry. The study aims to determine the dependence of Ce = eL/u'3 on the distance from the wall and the Reynolds number. The results shows that Ce decreases as the distance from the wall increases and reaches a minimum value, which appears to be independent of the Reynolds number. Further, this value, which is about 0.40.5, is the same as in homogeneous isotropic turbulence at high Reynolds numbers. This lends support to the possibility that a universal value for Ce at large Reynolds numbers cannot be ruled out.


2016 
Tang SL, Antonia RA, Djenidi L, Danaila L, Zhou Y, 'Boundedness of the velocity derivative flatness factor in a turbulent plane jet', Proceedings of the 20th Australasian Fluid Mechanics Conference, AFMC 2016 (2016) © 2006 Australasian Fluid Mechanics Society. All rights reserved. This paper focuses on the statistics of normalized fourthorder moment of the longitudinal velocity derivative, ¿... [more] © 2006 Australasian Fluid Mechanics Society. All rights reserved. This paper focuses on the statistics of normalized fourthorder moment of the longitudinal velocity derivative, ¿u/¿x, i.e. the flatness factor S4 = (¿u/¿x)4/(¿u/¿x)22 on the axis of a plane jet over a range of Taylor microscale Reynolds number varying between R¿ ' 500 and 1100. The aim is to determine the dependence of S4 on R¿. Different tests on the jet axis show that local isotropy is closely satisfied, allowing the use of eiso, the locally isotropic form of the mean turbulent kinetic energy dissipation rate e. The measurements show that S4 remains approximately constant when R¿ = 500. This is inconsistent S4 ~ Ra¿, where a is a small positive number, as predicted by various internal intermittency models. The constancy of S4 is in full agreement with the relatively recent results (6) showing that S3, the skewness of ¿u/¿x, also tends to a constant when R¿ increases. The present results conform with the original similarity hypotheses of Kolmogorov (1).


2016 
Tang S, Antonia RA, Djenidi L, Danaila L, Zhou Y, Zhou T, 'Towards Local Isotropy of Higher Order Statistics in Wakes', PROCEEDINGS OF THE 5TH INTERNATIONAL CONFERENCE ON JETS, WAKES AND SEPARATED FLOWS (ICJWSF2015), KTH, Royal Inst Technol, Stockholm, SWEDEN (2016) [E1]


2015 
Tang SL, Antonia RA, Djenidi L, Zhou Y, 'Consequences of selfpreservation in a turbulent farwake', 9th International Symposium on Turbulence and Shear Flow Phenomena, TSFP 2015 (2015) On the basis of a twopoint similarity analysis, the powerlaw variations for the different lengthscales (e.g. the Taylor microscale, and the Kolmogorov scale) and the velocity s... [more] On the basis of a twopoint similarity analysis, the powerlaw variations for the different lengthscales (e.g. the Taylor microscale, and the Kolmogorov scale) and the velocity scales (e.g. the rms, the Kolmogorov velocity) in the farwake of a circular cylinder are derived. In particular, an exact relation for estimating the mean turbulent energy dissipation rate f on the wake axis is obtained. All these relations are supported reasonably well by hotwire data in the farwake at a Reynolds number based on the free stream velocity and the cylinder diameter of 2000.


2015 
Lefeuvre N, Djenidi L, Antonia R, 'Transport equation of the mean energy dissipation rate on the axis of a turbulent round jet', 9th International Symposium on Turbulence and Shear Flow Phenomena, TSFP 2015 (2015) The transport equation of the mean turbulent energy dissipation (¿) along the axis of a turbulent round jet is examined in the context of the scalebyscale energy budget. The pre... [more] The transport equation of the mean turbulent energy dissipation (¿) along the axis of a turbulent round jet is examined in the context of the scalebyscale energy budget. The previously well established (xx ) , where x is the virtual origin, dependence of ¿ along the jet axis is shown to be consistent with the limits at both small and largescale of this budget. It is found that the isotropic form of the transport equation for ¿ requires the sum S + 2 G /R to be constant along the jet axis for given initial conditions, where S is the skewness, G is the destruction coefficient and R is the Taylor micro scale Reynolds number. These results are consistent the theoretical analysis of Thiesset etal. (2014) who showed that S + 2G /R ~ R . The way that the sum S + 2 G /R approaches zero at high R , as required for stationary isotropic turbulence, is discussed. 0 0 u u ¿ u u ¿ u u ¿ ¿ u u ¿ ¿ 4 1


2015 
Thiesset F, Schaeffer V, Antonia RA, Djenidi L, Danaila L, 'Analogy between scalar and velocity fluctuations in a slightly heated axisymmetric mixing layer', 9th International Symposium on Turbulence and Shear Flow Phenomena, TSFP 2015 (2015) The paper is an experimental and analytical investigation of the analogy between the variance of the passive scalar field, ¿ and the dynamical field, in particular the total kine... [more] The paper is an experimental and analytical investigation of the analogy between the variance of the passive scalar field, ¿ and the dynamical field, in particular the total kinetic energy q (the sum of variances of the three velocity components). The analogy between the transport equation of ¿ and q is most likely to be valid under the constraint of statistical homogeneity (negligible effect of pressure) and for a Schmidt (or Prandlt) number equal to 1 (molecular or viscous diffusion predominates in the same range of scales). Experimental data were inferred from simultaneous hot and coldwire measurements in a slightly heated axisymmetric shear layer, for which similar initial and boundary conditions were imposed for both ¿ and q (i.e., the mean temperature and velocity gradient are both present). We show clear experimental evidence that: i) at large scales, for which the production is dominant (either shear or mean temperature gradient), the analogy between the kinetic energy and the temperature variance is satisfactory. ii) the smallest scales, especially for locations where the magnitude of the mean temperature and velocity gradient decreases, become shearindependent, and the analogy is not tenable. We provide an analytical explanation for this behaviour, based on a simple model which is reasonably wellvalidated against experimental data. It is shown that: i) local isotropy is not necessary for the similarity ¿  q to be valid; ii) the main factor which allows the similarity to hold is the production term in the onepoint kinetic energy budget equation. When only production is present, a simple closure of this term based on a Prandtltype model leads to simple, analytical solutions and the similarity can be explained, iii) when other effects (e.g., decay) are present, departures from similarity can occur. 2 2 2 2


2015 
Kamruzzaman M, Djenidi L, Antonia RA, 'Shearless mixing layer in grid generated turbulence at moderate Reynolds number', 9th International Symposium on Turbulence and Shear Flow Phenomena, TSFP 2015 (2015) The decay of turbulence in a shearless mixing layer generated from the junction of side by side grids with different mesh sizes but identical solidity is being investigated using ... [more] The decay of turbulence in a shearless mixing layer generated from the junction of side by side grids with different mesh sizes but identical solidity is being investigated using hot wire anemometry. It is observed that turbulence decays according to a powerlaw, albeit, with a different powerlaw exponent (n) for each grid. The measurements suggest the existence of turbulent energy transfer from the larger mesh region to the smaller mesh region at distances as large as 75 M from the grid, where M is the mesh size of the larger mesh grid. It is further observed that the Reynolds number R remains constant along the centreline of the flow (i.e. the junction of the two grids), confirming that selfpreservation is satisfied in this region of the flow. This is supported by the one dimensional velocity spectra E (k ). On the centreline, the measured energy spectra at positions x/M = 45 collapse onto a single curve at all wavenumbers when scaled by either the Kolmogorov velocity and length scales or the rms velocity (u!) and Taylor microscale (X). Away from the centreline the spectra do not present such collapse. L L ¿ u 1 L


2015 
Talluru KM, Kamruzzaman M, Djenidi L, Antonia RA, 'Selfpreservation in zero pressure gradient turbulent boundary layers', 9th International Symposium on Turbulence and Shear Flow Phenomena, TSFP 2015 (2015) Starting with the NavierStokes Equation (NSE), we derived the conditions for selfpreservation (SP) in a zeropressure gradient (ZPG) turbulent boundary layer. The analysis showed... [more] Starting with the NavierStokes Equation (NSE), we derived the conditions for selfpreservation (SP) in a zeropressure gradient (ZPG) turbulent boundary layer. The analysis showed that it is strictly not possible to obtain SP in a ZPG turbulent boundary layer, unless the viscous term is eliminated from the NSE. This can be achieved in a smooth wall boundary layer only when the Reynolds number (Re) approaches infinity. In the case of rough walls, it is noted that the viscous effects can be compensated by surface roughness and therefore, SP is achievable, irrespective of Re. In this case, SP analysis showed that velocity scale (u ) must be constant and the length scale (l) should vary linearly with streamwise distance (x). These SP conditions are tested using experimental data taken over a similar streamwise fetch on a smooth wall and several types of rough walls. It is observed that complete SP in a ZPG turbulent boundary layer is possible when the roughness height (¿) increases linearly with x, where both the SP constraints (u =U = constant and l = d ¿ x) are met. In the present rough wall study, U is observed to remain practically constant in x and d ~ x and appears to be the next best candidate for achieving SP. * * T T


2015 
Djenidi L, 'The Lattice Boltzmann Method and the Problem of Turbulence', PROCEEDINGS OF THE INTERNATIONAL CONFERENCE OF NUMERICAL ANALYSIS AND APPLIED MATHEMATICS 2014 (ICNAAM2014), Rhodes, GREECE (2015) [E1]


2014 
Kamruzzaman M, Djenidi L, Antonia RA, 'Effects of low Reynolds number on decay exponent in grid turbulence', Procedia Engineering (2014) [E1] This present work is to investigate on the decay exponent (n) of decay power law (q' ~(t  To)n , q' is the total turbulent kinetic energy, t is the decay time, t0 is ... [more] This present work is to investigate on the decay exponent (n) of decay power law (q' ~(t  To)n , q' is the total turbulent kinetic energy, t is the decay time, t0 is the virtual origin) at low Reynolds numbers based on Taylor microscale R¿(= u '¿/ v) = 64 . Hot wire measurements are carried out in a grid turbulence subjected to a 1.36:1 contraction. The grid consists in large square holes (mesh size 43.75 mm and solidity 43%); small square holes (mesh size 14.15mm and solidity 43%) and woven mesh grid (mesh size 5mm and solidity 36%). The decay exponent (n) is determined using three different methods: (i) decay of q' , (ii) transport equation for s , the mean dissipation of the turbulent kinetic energy and (iii) ¿ method (Taylor microscale ¿ = v5( q )/ (ed)} , angular bracket denotes the ensemble). Preliminary results indicate that the magnitude n increases while R¿ (= u'¿/v)decreases, in accordance with the turbulence theory. 2 2 2 2


2014 
Kamruzzaman M, Talluru KM, Djenidi L, Antonia RA, 'An experimental study of turbulent boundary layer over 2D transverse circular bars', Proceedings of the 19th Australasian Fluid Mechanics Conference, AFMC 2014 (2014) In this paper, we present the results from a turbulent boundary layer developing over a rough surface. The surface consists of transverse cylindrical rods (k, the rod diameter) th... [more] In this paper, we present the results from a turbulent boundary layer developing over a rough surface. The surface consists of transverse cylindrical rods (k, the rod diameter) that are periodically arranged in the streamwise direction with a spacing of ¿/k = 8 (¿ is the distance between two adjacent roughness elements), that results in maximum form drag. Particular attention is paid to the measurement of the friction velocity (U ) that plays a major role in the assessment of the roughness effects on the flow. Hotwire anemometry is used to measure the mean and fluctuating velocity components and pressure tap measurements are carried out to obtain the drag. Two methods are used to determine U . One is based on the momentum integral equation. The second relies on measuring the pressure distribution around one roughness element. Results show that both methods give consistent values for U to within 3%. Further, the drag coefficient (C ) is observed to be independent of the Reynolds number. t t t D


2014 
Saridakis IJ, Lau TCW, Djenidi L, Nathan GJ, 'Monte Carlo simulations of a medianfilter technique to discriminate between particle and fluid velocity fields', Proceedings of the 19th Australasian Fluid Mechanics Conference, AFMC 2014 (2014) An error analysis is reported of a method to discriminate between the tracer particles used to mark the carrierphase and the suspended particles in a twophase flow for particle ... [more] An error analysis is reported of a method to discriminate between the tracer particles used to mark the carrierphase and the suspended particles in a twophase flow for particle image velocimetry. The discrimination was obtained through application of a medianfilter to twophase image pairs, generated artificially by a Monte Carlo simulation. A LambOseen vortex was selected as the simulated flow for both the gas and solidphases, as it provides a range of velocities within the simulated field. The rotational velocities of both phases were selected to be different, allowing a range of slip velocities to be analysed. Simulations were executed with a range of particle and tracer volumetric loadings, particle sizes and filter widths. This analysis provides much more detail than was previously available on the conditions for which a median filter will accurately discriminate between tracers and larger particles in a real flow. 

2014 
Tang SL, Djenidi L, Antonia RA, Zhou Y, 'POD analyses of PIV and hot wire velocity data in a cylinder wake', Proceedings of the 19th Australasian Fluid Mechanics Conference, AFMC 2014 (2014) The Proper Orthogonal Decomposition (POD) method has become a wellestablished tool used for identifying coherent structures since first introduced by Lumley [1]. In the present p... [more] The Proper Orthogonal Decomposition (POD) method has become a wellestablished tool used for identifying coherent structures since first introduced by Lumley [1]. In the present paper, we will compare two PODs in a cylinder wake. One is carried out on Particle Image Velocimetry (PIV) data (hereafter denoted POD ) and the other is performed on single hotwire measurements (hereafter denoted POD ). It is revealed that both PODs capture well the large scale corresponding to the Karman vortex shedding. The results suggest that POD provides a less unambiguous and more objective identification of smaller scales than POD . It is also found that the POD energy distribution, when adequately normalized, collapses well with the 1D velocity spectrum. PIV HW HW PIV HW


2014 
Lefeuvre N, Djenidi L, Antonia RA, Zhou T, 'Turbulent kinetic energy and temperature variance budgets in the far wake generated by a circular cylinder', Proceedings of the 19th Australasian Fluid Mechanics Conference, AFMC 2014 (2014) Measurements of velocity and the temperature fluctuations have been performed to determine the budget of q ¯ (mean turbulence kinetic energy) and ¿ ¯ (temperature variance) in the... [more] Measurements of velocity and the temperature fluctuations have been performed to determine the budget of q ¯ (mean turbulence kinetic energy) and ¿ ¯ (temperature variance) in the far wake of a cylinder. The two budgets show similar physical phenomena (advection and diffusion) as the source of large scale inhomogeneity on the flow centreline. It was noted that the estimates of the dissipation rates e¯ and ¿¯ of q ¯ and ¿ ¯, respectively, obtained using a spectral chart method results in a better closure in both the q ¯ and ¿ ¯ budgets than their isotropic counterparts. 2 2 2 2 2 2


2013 
Djenidi L, Tardu S, Antonia RA, 'On the ergodicity of grid turbulence', International Symposium on Turbulence and Shear Flow Phenomena, TSFP 2013 (2013) A long time running direct numerical simulation (DNS) based on the lattice Boltzmann method is carried out in grid turbulence with the view to compare spatially averaged statistic... [more] A long time running direct numerical simulation (DNS) based on the lattice Boltzmann method is carried out in grid turbulence with the view to compare spatially averaged statistical properties in planes perpendicular to the mean flow with their temporal counterparts. The results show that the two averages become equal a short distance downstream of the grid. This equality indicates that the flow has become homogeneous in a plane perpendicular to the mean flow. This is an important result, since it confirms that hotwire measurements are appropriate for testing theoretical results based on spatially averaged statistics. It is equally important in the context of DNSs of grid turbulence, since it justifies the (lateral) spatial averaging using several realizations, to determine various statistical properties. Finally, the very good agreement between temporal and spatial averages validates the comparison between temporal (experiments) and spatial (DNS) statistical properties. The results are also interesting because, since the flow is stationary in time and spatially homogeneous in the lateral directions, the equality between the two types of averaging can be seen to provide support for the ergodic hypothesis in grid turbulence in planes perpendicular to the mean flow.


2012 
Lee SK, Djenidi L, Antonia RA, 'Spectral method for determining mean dissipation rates of turbulent kinetic energy and passive scalar variance', Proceedings of the 18th Australasian Fluid Mechanics Conference, AFMC 2012 (2012) Mean dissipation rates <e> and <¿> of the turbulent kinetic energy and of a passive scalar are important in the theory and modelling of turbulent mixing. In reality, t... [more] Mean dissipation rates <e> and <¿> of the turbulent kinetic energy and of a passive scalar are important in the theory and modelling of turbulent mixing. In reality, turbulence is usually not isotropic. Twelve velocity derivatives and three scalar derivatives are required to compute these quantities, and so the estimate of the dissipation rates presents a real challenge. We overcome this by developing a spectral method that is tenable for a wide range of Taylor microscale Reynolds numbers provided the small scales are not adversely affected by flow inhomogeneities. The method applies to turbulent mixing for a Prandtl number close to unity and excludes nearwall turbulence. It involves juxtaposing a series of calibrated reference spectra at increments of ¿<e> and ¿<¿> to the measured spectra to identify the best match. The technique is demonstrated by applying it to previously published grid turbulence data.


2012 
Lee SK, Djenidi L, Antonia RA, 'Destruction coefficients for mean dissipation rates in grid turbulence', THMT12. PROCEEDINGS OF THE SEVENTH INTERNATIONAL SYMPOSIUM ON TURBULENCE, HEAT AND MASS TRANSFER, Palermo, ITALY (2012)


2012 
Lefeuvre N, Djenidi L, Antonia RA, 'Turbulent crossbar wake with passive scalar. Symposium on Turbulence, Heat and Mass Transfer', THMT12. PROCEEDINGS OF THE SEVENTH INTERNATIONAL SYMPOSIUM ON TURBULENCE, HEAT AND MASS TRANSFER, Palermo, ITALY (2012)


2011 
Lee SK, Djenidi L, Antonia RA, Rajagopalan SR, 'Spectrum of a passive scalar in stretched grid turbulence at low Reynolds numbers', Journal of Physics: Conference Series, Warsaw, Poland (2011) [E1]


2011 
Djenidi L, Antonia RA, Rajagopalan S, 'Scalebyscale energy and temperature variance budgets in a turbulent mixing layer', 7th International Symposium on Turbulence and Shear Flow Phenomena, TSFP 2011 (2011) Velocity and temperature measurements are carried out in a mixing layer of a heated turbulent round jet with the aim of investigating how the large scale vortical structures that ... [more] Velocity and temperature measurements are carried out in a mixing layer of a heated turbulent round jet with the aim of investigating how the large scale vortical structures that characterize the mixing layer affect both the energy and scalar variance transport terms. The assessment is performed through the measurements of the second and thirdorder velocity and temperature structure functions. Compared with the jet centreline, the structure functions for both velocity and temperature are altered in the mixing layer. The modification is consistent with the presence of large scale coherent structures in the mixing layer. For example, the approach to the limiting value of 2 for the secondorder structure functions, which is monotonic on the jet centreline, undergoes an oscillation in the mixing layer. An oscillation is also observed for the thirdorder structure functions in the mixing layer. The scalebyscale energy budgets suggest that the nonhomogeneity in the mixing layer contributes more to the budget than on the jet centreline.


2010 
Antonia RA, Djenidi L, 'On the outer layer controversy for a turbulent layer over a rough wall', Proceedings of the IUTAM Symposium on The Physics of WallBounded Turbulent Flows on Rough Walls, Heidelberg, Germany (2010) [E1]


2009 
Ali MA, Djenidi L, 'Lattice Boltzmann simulation of pulsed jet in Tshaped micromixer', IUTAM Symposium on Advances in Micro and Nanofluidics: Proceedings of the IUTAM Symposium on Advances in Micro and Nanofluidics, Dresden, Germany (2009) [E1]


2008  Djenidi L, 'Validation of the Lattice Boltzmann method with LDV and PIV measurements', 14th International Symposium on Applications of Laser Techniques to Fluid Mechanics. Book of Abstracts, Lisbon, Portugal (2008) [E2]  
2007 
Benaissa A, Djenidi L, Antonia RA, Parker R, 'Effect of initial conditions on the scalar decay in grid turbulence at low R1', 16th AFMC. Proceedings of the 16th Australasian Fluid Mechanics Conference, Gold Coast, QLD (2007) [E1]


2007  Djenidi L, Lavoie PLD, 'Nearwake decaying turbulence behind a crossbar', Advances in Turbulence X1: Proceedings of the 11th EUROMECH European Turbulence Conference, Porto, Portugal (2007) [E2]  
2006 
Djenidi L, Antonia RA, Amielh M, Anselmet F, 'Near wall organization of a turbulent boundary layer over a twodimensional rough wall', 13th International Symposium Lisbon on Applications of Laser Techniques to Fluid Mechanics CDRom, Lisbon, Portugal (2006) [E1]


2006 
Moghtaderi B, Djenidi L, 'Mixing Behaviour in a Novel MicroReactor', Australian Workshop on Fluid Mechanics, Melbourne (2006) [E3]


2006 
Ali MA, Djenidi L, Moghtaderi B, 'Lattice Boltzmann Simulation of synthetic Jet in TShaped Micromixer', Australian Workshop on Fluid Mechanics, Melbourne (2006) [E3]


2006 
Lavoie PLD, Djenidi L, Antonia RA, 'Effect of Initial Conditions on the Generation of Coherent Structures in Grid Turbulence', Book of Extended Abstracts Whither Turbulence Prediction and Control, Seoul, Korea (2006) [E3]


2006  Djenidi L, Lavoie PLD, Burattini P, 'Lattice Boltzmann Simulation of a CrossBar Wake', Book of Extended Abstracts Whither Turbulence Prediction and Control, Seoul, Korea (2006) [E3]  
2006 
Burattini P, Djenidi L, Antonia RA, 'Effect of a Passive Disturbance on the Heat Transport in the Near Field of a Round Jet', Proceedings 13th International Heat Transfer Conference, Sydney, Australia (2006) [E1]


2006 
Tang SL, Antonia RA, Djenidi L, Danaila L, Zhou Y, 'Boundedness of the velocity derivative flatness factor in a turbulent plane jet', Proceedings of the 20th Australasian Fluid Mechanics Conference, AFMC 2016 (2006) © 2006 Australasian Fluid Mechanics Society. All rights reserved. This paper focuses on the statistics of normalized fourthorder moment of the longitudinal velocity derivative, ¿... [more] © 2006 Australasian Fluid Mechanics Society. All rights reserved. This paper focuses on the statistics of normalized fourthorder moment of the longitudinal velocity derivative, ¿u/¿x, i.e. the flatness factor S4 = (¿u/¿x)4/(¿u/¿x)22 on the axis of a plane jet over a range of Taylor microscale Reynolds number varying between R¿ ' 500 and 1100. The aim is to determine the dependence of S4 on R¿. Different tests on the jet axis show that local isotropy is closely satisfied, allowing the use of eiso, the locally isotropic form of the mean turbulent kinetic energy dissipation rate e. The measurements show that S4 remains approximately constant when R¿ = 500. This is inconsistent S4 ~ Ra¿, where a is a small positive number, as predicted by various internal intermittency models. The constancy of S4 is in full agreement with the relatively recent results (6) showing that S3, the skewness of ¿u/¿x, also tends to a constant when R¿ increases. The present results conform with the original similarity hypotheses of Kolmogorov (1).


2005 
Djenidi L, Leonardi S, Orlandi P, Antonia RA, 'Effect of a 2D rough wall on the anisotropy of a turbulent channel flow', Engineering Turbulence Modelling and Experiments 6, Italy (2005) [E1]


2005 
Lavoie PLD, Antonia RA, Djenidi L, 'Use of Energy Scale Budget to Quantify Effect of Initial Conditions on Decaying Grid Turbulence', Proceedings of 20th Canadian Congress of Applied Mechanics, Montreal (2005) [E3]


2005 
Moghtaderi B, Shames I, Djenidi L, 'Application of MicroPIV Technique in Examining the Mixing Behaviour in a Novel MicroReactor', Proceedings of the 4th Australian Conference on Laser Diagnostics in Fluid Mechanics and Combustion, McLaren Vale, S.A. (2005) [E1]


2005 
Agrawal A, Djenidi L, Antonia RA, 'Measurements Over a Flat Plate With and Without Suction', Progress in Turbulence, Germany (2005) [E1]


2005 
Agrawal A, Burattini P, Djenidi L, Antonia RA, 'Interaction between wakes shed by two sidebyside square cylinders', 35th AIAA Fluid Dynamics Conference and Exhibit (2005) The lowReynolds number flow around two square cylinders placed sidebyside in a channel is investigated using the lattice Boltzmann method (LBM). The effects of the gap ratio s/... [more] The lowReynolds number flow around two square cylinders placed sidebyside in a channel is investigated using the lattice Boltzmann method (LBM). The effects of the gap ratio s/d (s is the separation between the cylinders and d is the characteristic dimension) on the flow are studied. These simulations reveal the existence of regimes with either synchronized or nonsynchronized vortexshedding, with transition occurring at s/d ¿ 2. Detailed results are presented at Re = 73 for s/d = 2.5 and 0.7 corresponding to the synchronized and flipflop regimes, respectively. Vortex shedding from the cylinder occurs either inphase or inantiphase in the synchronized regime. However, linear stochastic estimate (LSE) calculations show that inphase locking is the predominant mode. LSE is also employed to educe the underlying modes in the flipflop regime, where evidence for both inphase and antiphase locked vortices is found, indicating that this regime is in a quasistable state between these two modes. The merging of the wakes, which is gradual for the synchronized regime, occurs rapidly in the flipflop regime. The mean pressure on the upstream surface is symmetric and asymmetric for the synchronized and flipflop regimes, respectively. Differences in results between the two regimes are interpreted in terms of the interaction of the jet formed between the cylinders with the adjoining wakes, the strength of this interaction depending on the spacing. © 2005 by the American Institute of Aeronautics and Astronautics, Inc. All rights reserved.


2005 
Agrawal A, Burattini P, Djenidi L, Antonia RA, 'Interaction Between Wakes Shed by Two SidebySide Square Cylinders', 35th AIAA Fluid Dynamics Conference and Exhibit Proceedings, Toronto, Ontario Canada (2005) [E1]


2004 
Agrawal A, Djenidi L, Antonia RA, 'Evolution of the anisotropy over a flat plate with suction', 12th International Symposium on Application of Laser Techniques to Fluid Mechanics, Lisbon, Portugal (2004) [E2]


2004 
Oyewola O, Djenidi L, Antonia RA, 'The effect of double suction on the turbulence structure', Proceedings Tenth Asian Congress of Fluid Mechanics, University of Peradeniya (2004) [E1]


2004 
Oyewola O, Djenidi L, Burattini P, Antonia RA, 'Effect of localised wall suction on the smallscale motion in a turbulent boundary layer', Proceedings of the Fifteenth Australasian Fluid Mechanics Conference, University of Sydney (2004) [E1]


2004 
Lavoie PLD, Antonia RA, Djenidi L, 'Effect of grid geometry on the scalebyscale budget of decaying grid turbulence', Proceedings of the Fifteenth Australasian Fluid Mechanics Conference, University of Sydney (2004) [E1]


2003 
Leonardi S, Orlandi P, Djenidi L, Antonia RA, 'Structure of Turbulent Channel Flow with Square bars on One Wall', Third International Symposium on Turbulence and Shear Flow Phenomena, Sendai, Japan (2003) [E2]


2003 
Oyewola O, Djenidi L, Antonia RA, 'Effect of Suction Applied through a Pair of Porous Wall Strips, on a Turbulent Boundary Layer', Third International Symposium on Turbulence and Shear Flow Phenomena, Sendai, Japan (2003) [E2]


2002 
Djenidi L, Gall P, Vincent A, Antonia RA, 'Effect of Wall Suction on the Structure of a Turbulent Boundary Layer', Applications of Laser Techniques to Fluid Mechanics, Lisbon, Portugal (2002) [E2]


2002 
Djenidi L, Savill A, Antonia RA, 'Calculation of a lowshear turbulent boundary layer using a secondmoment order closure', Engineering Turbulence Modelling and Experiments 5, Mallorca, Spain (2002) [E1]


2002 
Leonardi S, Orlandi P, Djenidi L, Antonia RA, 'DNS of a turbulent channel flow with different rough walls', Advances in Turbulence IX, Southhampton, UK (2002) [E2]


2001 
Oyewola O, Djenidi L, Antonia RA, 'Effect on Wall Suctin on a Turbulent Boundary Layer: Reynolds Number Dependence', Proceedings of the Fourteenth Australasian Fluid Mechanics Conference Volume I, Adelaide, Australia (2001) [E1]


2001 
Djenidi L, Antonia RA, 'Modelling of the Effect of Concentrated Wall Suction on a Turbulent Boundary Layer Using a SecondOrder Moment Closure', Proceedings of the Fourteenth Australasian Fluid Mechanics Conference Volume I, Adelaide, Australia (2001) [E1]


2001 
Bisceglia S, Smalley RJ, Djenidi L, Antonia RA, 'Structure of Rough Wall Turbulent Boundary Layers at Relatively High Reynolds Number', Proceedings of the Fourteenth Australasian Fluid Mechanics Conference Volume I, Adelaide, Australia (2001) [E1]


2000 
Rehab H, Antonia RA, Djenidi L, 'Statistics of a high schmidt number passive scalar in the farwake', Proceedings of the Eighth European Turbulence Conference, Spain (2000) [E1]


2000 
Rehab H, Djenidi L, Antonia RA, 'Evolution of the pdf of a high Schmidt number passive scalar ina plane wake', Tenth International Symposium on Applications of Laser Techniques to Fluid Mechanics, Lisbon (2000) [E1]


1999 
Rehab H, Antonia RA, Djenidi L, 'Mixing of a High Sc Passive Scalar in aTurbulent NearWake', Proceedings of the 3rd ASME/JSME Joint Fluids Engineering Conference FEDSM'99, San Francisco (1999) [E1]


1999 
Rehab H, Djenidi L, Antonia RA, 'LDV and PLIF Measurements in a Turbulent Boundary Layer Over a Rough Wall', Proceedings of the Second Australian Conference on Laser Diagnostics in Fluid Mechanics and Combustion, Melbourne (1999) [E1]


1998 
Rehab H, Antonia RA, Djenidi L, 'High Schmidt Number Passive Scalar in a Turbulent NearWake', Advances in Turbulence VII, St Jean Cap Ferrat (1998) [E1]


1998 
Rehab H, Djenidi L, Antonia RA, 'LIF Measuremejnts in a Turbulent FarWake', Ninth International Suymposium on Applications of Laser Techniques, Lisbon; 1316 July 1998 (1998) [E1]


1998 
Elavarasan R, Djenidi L, Antonia RA, 'A Study of the NearWake Region of a Circular Cylinder', Ninth International Symposium on Applications of Laser Techniques to Fluid Mechanics, Lisbon (1998) [E1]


1998 
Djenidi L, Elavarasan R, Antonia RA, 'Turbulent Boundary Layer OverTransverse Square Cavities', Proceedings of 13th Australasian Fluid Mechanics Conference (2 volumes), Melbourne, Australia (1998) [E1]


1998 
Rehab H, Antonia RA, Djenidi L, 'Anisotropy of High Schmidt Number Passive Scalar Fluctuations in a Turbulent NearWake', Proceedings of 13th Australasian Fluid Mechanics Conference (2 volumes), Melbourne, Australia (1998) [E1]


Show 78 more conferences 
Grants and Funding
Summary
Number of grants  36 

Total funding  $4,070,201 
Click on a grant title below to expand the full details for that specific grant.
20191 grants / $579,156
Wall Turbulence Control: Beyond the Canonical Smooth Wall Case$579,156
Funding body: ARC (Australian Research Council)
Funding body  ARC (Australian Research Council) 

Project Team  Professor Lyazid Djenidi, Mr Shubham Bharat Kumbhar 
Scheme  Discovery Projects 
Role  Lead 
Funding Start  2019 
Funding Finish  2021 
GNo  G1800180 
Type Of Funding  Aust Competitive  Commonwealth 
Category  1CS 
UON  Y 
20141 grants / $15,000
Open loop flow control of a trubulent boundary layer over a smooth surface using wellsuction $15,000
Funding body: University of Newcastle  Faculty of Engineering & Built Environment
Funding body  University of Newcastle  Faculty of Engineering & Built Environment 

Project Team  Doctor Murali Talluru, Professor Lyazid Djenidi 
Scheme  Pilot Grant 
Role  Investigator 
Funding Start  2014 
Funding Finish  2014 
GNo  G1400978 
Type Of Funding  Internal 
Category  INTE 
UON  Y 
20122 grants / $962,821
Effect of forcing on the turbulent mixing of a passive scalar$575,471
Funding body: ARC (Australian Research Council)
Funding body  ARC (Australian Research Council) 

Project Team  Emeritus Professor Robert Antonia, Professor Lyazid Djenidi, Prof Luminita Danaila 
Scheme  Discovery Projects 
Role  Investigator 
Funding Start  2012 
Funding Finish  2017 
GNo  G1100203 
Type Of Funding  Aust Competitive  Commonwealth 
Category  1CS 
UON  Y 
Study of a turbulent boundary layer over 2D and 3D rough walls$387,350
Funding body: ARC (Australian Research Council)
Funding body  ARC (Australian Research Council) 

Project Team  Professor Lyazid Djenidi, Emeritus Professor Robert Antonia, Associate Professor Stefano Leonardi 
Scheme  Discovery Projects 
Role  Lead 
Funding Start  2012 
Funding Finish  2014 
GNo  G1100069 
Type Of Funding  Aust Competitive  Commonwealth 
Category  1CS 
UON  Y 
20091 grants / $450,000
Turbulent mixing of a passive scalar$450,000
Funding body: ARC (Australian Research Council)
Funding body  ARC (Australian Research Council) 

Project Team  Emeritus Professor Robert Antonia, Professor Lyazid Djenidi 
Scheme  Discovery Projects 
Role  Investigator 
Funding Start  2009 
Funding Finish  2011 
GNo  G0188686 
Type Of Funding  Aust Competitive  Commonwealth 
Category  1CS 
UON  Y 
20083 grants / $29,206
Effects of Initial and Boundary Conditions on Turbulent Flows$20,000
Funding body: University of Newcastle
Funding body  University of Newcastle 

Project Team  Professor Lyazid Djenidi, Emeritus Professor Robert Antonia 
Scheme  Near Miss Grant 
Role  Lead 
Funding Start  2008 
Funding Finish  2008 
GNo  G0188413 
Type Of Funding  Internal 
Category  INTE 
UON  Y 
Modelling Fluid Flow in MicroChannels$7,500
Funding body: University of Newcastle  Faculty of Engineering & Built Environment
Funding body  University of Newcastle  Faculty of Engineering & Built Environment 

Project Team  Doctor Jennifer Forrester, Professor Lyazid Djenidi 
Scheme  Pilot Grant 
Role  Investigator 
Funding Start  2008 
Funding Finish  2008 
GNo  G0189096 
Type Of Funding  Internal 
Category  INTE 
UON  Y 
14th Int Symp On Applicatipons ol Laser Techniqures to Fluid Mechanics, Lisbon (Portugal), 7/7/2008  10/7/2008$1,706
Funding body: University of Newcastle
Funding body  University of Newcastle 

Project Team  Professor Lyazid Djenidi 
Scheme  Travel Grant 
Role  Lead 
Funding Start  2008 
Funding Finish  2008 
GNo  G0188918 
Type Of Funding  Internal 
Category  INTE 
UON  Y 
20073 grants / $422,500
An Integrated MultiNode Microfluidics Facility$400,000
Funding body: ARC (Australian Research Council)
Funding body  ARC (Australian Research Council) 

Project Team  Professor Behdad Moghtaderi, Professor Geoffrey Evans, Professor Brian Haynes, Professor Assaad Masri, Professor Keith King, Dr Zeyad Alwahabi, Dr JongLeng Liow, Assoc. Prof Yinghe He, Laureate Professor Kevin Galvin, Conjoint Professor Bogdan Dlugogorski, Professor Eric Kennedy, Professor Lyazid Djenidi 
Scheme  Linkage Infrastructure Equipment & Facilities (LIEF) 
Role  Investigator 
Funding Start  2007 
Funding Finish  2007 
GNo  G0186649 
Type Of Funding  Scheme excluded from IGS 
Category  EXCL 
UON  Y 
Effects of Initial and Boundary Conditions on Turbulent Flows$20,000
Funding body: University of Newcastle
Funding body  University of Newcastle 

Project Team  Professor Lyazid Djenidi, Emeritus Professor Robert Antonia 
Scheme  Near Miss Grant 
Role  Lead 
Funding Start  2007 
Funding Finish  2007 
GNo  G0187181 
Type Of Funding  Internal 
Category  INTE 
UON  Y 
11th European Turbulence Conference (ETC11), Porto (Portugal), 25/6/2007  28/6/2007$2,500
Funding body: University of Newcastle
Funding body  University of Newcastle 

Project Team  Professor Lyazid Djenidi 
Scheme  Travel Grant 
Role  Lead 
Funding Start  2007 
Funding Finish  2007 
GNo  G0187614 
Type Of Funding  Internal 
Category  INTE 
UON  Y 
20063 grants / $560,782
PRC  Priority Research Centre for Energy$549,282
Funding body: University of Newcastle
Funding body  University of Newcastle 

Project Team  Conjoint Professor Bogdan Dlugogorski, Professor Behdad Moghtaderi, Emeritus Professor Robert Antonia, Professor Lyazid Djenidi, Associate Professor Jose De Dona, Professor Eric Kennedy, Associate Professor John Lucas, Conjoint Professor John Mackie, Emeritus Professor Marcel Maeder, Professor Brett Ninness, Emeritus Professor Adrian Page, Associate Professor Marian Radny, Associate Professor Phillip Smith, Professor Edward Szczerbicki, Emeritus Professor Terry Wall 
Scheme  Priority Research Centre 
Role  Investigator 
Funding Start  2006 
Funding Finish  2013 
GNo  G0186921 
Type Of Funding  Internal 
Category  INTE 
UON  Y 
A Fundamental Study on Microfluidic Characteristics of a Novel MicroReactor$10,000
Funding body: University of Newcastle
Funding body  University of Newcastle 

Project Team  Professor Behdad Moghtaderi, Professor Lyazid Djenidi 
Scheme  Near Miss Grant 
Role  Investigator 
Funding Start  2006 
Funding Finish  2006 
GNo  G0186070 
Type Of Funding  Internal 
Category  INTE 
UON  Y 
13th International Symposium on Application of Laser Techniques to Fluid Mecanics 2629 June$1,500
Funding body: University of Newcastle
Funding body  University of Newcastle 

Project Team  Professor Lyazid Djenidi 
Scheme  Travel Grant 
Role  Lead 
Funding Start  2006 
Funding Finish  2006 
GNo  G0186530 
Type Of Funding  Internal 
Category  INTE 
UON  Y 
20051 grants / $8,600
Study of turbulent boundary layer over a twodimensional rough surface$8,600
Funding body: Australian Academy of Science
Funding body  Australian Academy of Science 

Project Team  Professor Lyazid Djenidi 
Scheme  Scientific Visits to Europe 
Role  Lead 
Funding Start  2005 
Funding Finish  2005 
GNo  G0184433 
Type Of Funding  Other Public Sector  Commonwealth 
Category  2OPC 
UON  Y 
20042 grants / $8,997
Lattice Boltzmann simulation of a grid turbulence$7,542
Funding body: University of Newcastle
Funding body  University of Newcastle 

Project Team  Professor Lyazid Djenidi 
Scheme  Project Grant 
Role  Lead 
Funding Start  2004 
Funding Finish  2004 
GNo  G0183391 
Type Of Funding  Internal 
Category  INTE 
UON  Y 
12th International Symposium on Application of Laser Techniques to Fluid Mechanics, 1215 July 2004, Lisbon$1,455
Funding body: University of Newcastle
Funding body  University of Newcastle 

Project Team  Professor Lyazid Djenidi 
Scheme  Travel Grant 
Role  Lead 
Funding Start  2004 
Funding Finish  2004 
GNo  G0184131 
Type Of Funding  Internal 
Category  INTE 
UON  Y 
20031 grants / $5,792
Control of turbulent flows.$5,792
Funding body: University of Newcastle
Funding body  University of Newcastle 

Project Team  Professor Lyazid Djenidi, Conjoint Associate Professor Raj Rajagopalan 
Scheme  Project Grant 
Role  Lead 
Funding Start  2003 
Funding Finish  2003 
GNo  G0182404 
Type Of Funding  Internal 
Category  INTE 
UON  Y 
20022 grants / $177,400
Integrated Particle Image Thermometry/Velocimetry Facility.$175,000
Funding body: ARC (Australian Research Council)
Funding body  ARC (Australian Research Council) 

Project Team  Professor Behdad Moghtaderi, Professor Geoffrey Evans, Laureate Professor Graeme Jameson, Conjoint Professor Bogdan Dlugogorski, Emeritus Professor Terry Wall, Professor Dongke Zhang, Assoc. Prof Aibing Yu, Dr H Sidhu, Dr Rodney Weber, Dr Gregory Griffin, Professor Kiet Tieu, Professor Eric Kennedy, Laureate Professor Kevin Galvin, Professor Lyazid Djenidi, Associate Professor Anh Nguyen, Dr Geoffry Mercer 
Scheme  Linkage Infrastructure Equipment & Facilities (LIEF) 
Role  Investigator 
Funding Start  2002 
Funding Finish  2002 
GNo  G0181517 
Type Of Funding  Scheme excluded from IGS 
Category  EXCL 
UON  Y 
11th International Symposium on Applications of Laser Techniques to Fluid Mechanics, 811 July 2002, Lisbon$2,400
Funding body: University of Newcastle
Funding body  University of Newcastle 

Project Team  Professor Lyazid Djenidi 
Scheme  Travel Grant 
Role  Lead 
Funding Start  2002 
Funding Finish  2002 
GNo  G0181951 
Type Of Funding  Internal 
Category  INTE 
UON  Y 
20012 grants / $4,126
Rough wall turbulent boundary layers.$3,000
Funding body: AINSE (Australian Institute of Nuclear Science & Engineering)
Funding body  AINSE (Australian Institute of Nuclear Science & Engineering) 

Project Team  Professor Lyazid Djenidi 
Scheme  Research Grant 
Role  Lead 
Funding Start  2001 
Funding Finish  2001 
GNo  G0180375 
Type Of Funding  Aust Competitive  Non Commonwealth 
Category  1NS 
UON  Y 
14th Australasian Fluid Mechanics Conference Adelaide 814 December, 2001$1,126
Funding body: University of Newcastle
Funding body  University of Newcastle 

Project Team  Professor Lyazid Djenidi 
Scheme  Travel Grant 
Role  Lead 
Funding Start  2001 
Funding Finish  2001 
GNo  G0181560 
Type Of Funding  Internal 
Category  INTE 
UON  Y 
20002 grants / $12,080
Computational Fluid Dynamics for rough Wall Turbulent Flows$10,000
Funding body: University of Newcastle
Funding body  University of Newcastle 

Project Team  Professor Lyazid Djenidi 
Scheme  Project Grant 
Role  Lead 
Funding Start  2000 
Funding Finish  2000 
GNo  G0178946 
Type Of Funding  Internal 
Category  INTE 
UON  Y 
10th Int Symposium: Applications of Laser Technology to Fluid Mech. Lisbon 1013 July2000$2,080
Funding body: University of Newcastle
Funding body  University of Newcastle 

Project Team  Professor Lyazid Djenidi 
Scheme  Travel Grant 
Role  Lead 
Funding Start  2000 
Funding Finish  2000 
GNo  G0179828 
Type Of Funding  Internal 
Category  INTE 
UON  Y 
19991 grants / $174,000
Management of Turbulent Shear Flows$174,000
Funding body: ARC (Australian Research Council)
Funding body  ARC (Australian Research Council) 

Project Team  Emeritus Professor Robert Antonia, Professor Lyazid Djenidi, Conjoint Associate Professor Raj Rajagopalan 
Scheme  Large Grant 
Role  Investigator 
Funding Start  1999 
Funding Finish  2001 
GNo  G0177756 
Type Of Funding  Aust Competitive  Commonwealth 
Category  1CS 
UON  Y 
19982 grants / $14,077
SelfSustaining Turbulence on Rough Walls.$12,000
Funding body: University of Newcastle
Funding body  University of Newcastle 

Project Team  Professor Lyazid Djenidi 
Scheme  Project Grant 
Role  Lead 
Funding Start  1998 
Funding Finish  1998 
GNo  G0177380 
Type Of Funding  Internal 
Category  INTE 
UON  Y 
9th International Symposium on Applications of Laser Techniques to Fluid Mechanics, Portugal 1316 July 1998$2,077
Funding body: University of Newcastle
Funding body  University of Newcastle 

Project Team  Professor Lyazid Djenidi 
Scheme  Travel Grant 
Role  Lead 
Funding Start  1998 
Funding Finish  1998 
GNo  G0179759 
Type Of Funding  Internal 
Category  INTE 
UON  Y 
19974 grants / $288,846
Accelerated solar brine concentration for zero site discharge. 1997 SPIRT PARTNER.$154,500
Funding body: First State Power
Funding body  First State Power 

Project Team  Professor John Chambers, Professor Lyazid Djenidi 
Scheme  SPIRT Partner Funding 
Role  Investigator 
Funding Start  1997 
Funding Finish  1999 
GNo  G0179128 
Type Of Funding  Donation  Aust Non Government 
Category  3AFD 
UON  Y 
Accelerated solar brine concentration for zero site discharge$120,656
Funding body: ARC (Australian Research Council)
Funding body  ARC (Australian Research Council) 

Project Team  Professor John Chambers, Professor Lyazid Djenidi 
Scheme  Strategic Partnerships with Industry  Research & Training Scheme (SPIRT) 
Role  Investigator 
Funding Start  1997 
Funding Finish  1999 
GNo  G0176388 
Type Of Funding  Aust Competitive  Commonwealth 
Category  1CS 
UON  Y 
Turbulent Spot in a Laminar Boundary Layer.$8,000
Funding body: University of Newcastle
Funding body  University of Newcastle 

Project Team  Professor Lyazid Djenidi 
Scheme  Project Grant 
Role  Lead 
Funding Start  1997 
Funding Finish  1997 
GNo  G0176716 
Type Of Funding  Internal 
Category  INTE 
UON  Y 
Turbulent Boundary Layer over a dType Rough Surface$5,690
Funding body: AINSE (Australian Institute of Nuclear Science & Engineering)
Funding body  AINSE (Australian Institute of Nuclear Science & Engineering) 

Project Team  Professor Lyazid Djenidi 
Scheme  Research Grant 
Role  Lead 
Funding Start  1997 
Funding Finish  1997 
GNo  G0176925 
Type Of Funding  Aust Competitive  Non Commonwealth 
Category  1NS 
UON  Y 
19963 grants / $203,900
EFECTS OF DIFFERENT SURFACE CONDITIONS ON A TURBULENT BOUNDARY LAYER$200,000
Funding body: ARC (Australian Research Council)
Funding body  ARC (Australian Research Council) 

Project Team  Emeritus Professor Robert Antonia, Professor Lyazid Djenidi, Conjoint Associate Professor Raj Rajagopalan 
Scheme  Large Grant 
Role  Investigator 
Funding Start  1996 
Funding Finish  1998 
GNo  G0175285 
Type Of Funding  Aust Competitive  Commonwealth 
Category  1CS 
UON  Y 
8th International Symposium on Application of Laser Techniques to Fluid Mechanics  Portugal  811/7/96$2,400
Funding body: University of Newcastle
Funding body  University of Newcastle 

Project Team  Professor Lyazid Djenidi 
Scheme  Travel Grant 
Role  Lead 
Funding Start  1996 
Funding Finish  1996 
GNo  G0176368 
Type Of Funding  Internal 
Category  INTE 
UON  Y 
Reynolds Number Effects in a Turbulent Boundary Layer$1,500
Funding body: AINSE (Australian Institute of Nuclear Science & Engineering)
Funding body  AINSE (Australian Institute of Nuclear Science & Engineering) 

Project Team  Professor Lyazid Djenidi 
Scheme  Research Grant 
Role  Lead 
Funding Start  1996 
Funding Finish  1996 
GNo  G0175966 
Type Of Funding  Aust Competitive  Non Commonwealth 
Category  1NS 
UON  Y 
19951 grants / $10,000
Turbulent Boundary Layer over Grooved Surfaces$10,000
Funding body: University of Newcastle
Funding body  University of Newcastle 

Project Team  Professor Lyazid Djenidi 
Scheme  New Staff Grant 
Role  Lead 
Funding Start  1995 
Funding Finish  1995 
GNo  G0175426 
Type Of Funding  Internal 
Category  INTE 
UON  Y 
19911 grants / $142,918
Study of Coherent Structures in a Riblet Wall$142,918
Funding body: ARC (Australian Research Council)
Funding body  ARC (Australian Research Council) 

Project Team  Professor Lyazid Djenidi 
Scheme  Australian Postdoctoral Research Fellowship 
Role  Lead 
Funding Start  1991 
Funding Finish  1993 
GNo  G0174283 
Type Of Funding  Aust Competitive  Commonwealth 
Category  1CS 
UON  Y 
Research Supervision
Number of supervisions
Current Supervision
Commenced  Level of Study  Research Title  Program  Supervisor Type 

2021  PhD  Rough Wall Turbulent Boundary Layer Subjected to Different Wall Perturbations  PhD (Mechanical Engineering), College of Engineering, Science and Environment, The University of Newcastle  Principal Supervisor 
2018  PhD  Numerical Investigation of Micromixing Enhancement  PhD (Mechanical Engineering), College of Engineering, Science and Environment, The University of Newcastle  Principal Supervisor 
2017  PhD  Modeling and Assessing Natural Cross Ventilation in Buildings  PhD (Mechanical Engineering), College of Engineering, Science and Environment, The University of Newcastle  Principal Supervisor 
Past Supervision
Year  Level of Study  Research Title  Program  Supervisor Type 

2018  PhD  Can Turbulence Be Maintained in a Low Re Channel Flow?: A CFD Analysis  PhD (Mechanical Engineering), College of Engineering, Science and Environment, The University of Newcastle  Principal Supervisor 
2016  PhD  On the Effects of NonHomogeneity on Small Scale Turbulence  PhD (Mechanical Engineering), College of Engineering, Science and Environment, The University of Newcastle  Principal Supervisor 
2016  Masters  A Validity Framework Theory and Fatigue Damage Function for an SN Plane  M Philosophy (Mechanical Eng), College of Engineering, Science and Environment, The University of Newcastle  CoSupervisor 
2008  Masters  Lattice Boltzmann Simulation of Fluid Mixing in TShaped Micromixer  M Eng (Mechanical) [R], College of Engineering, Science and Environment, The University of Newcastle  Principal Supervisor 
2007  Masters  Numerical Simulation in laminar flows  Mechanical Engineering, Australian Catholic University  Sole Supervisor 
2006  PhD  Effects of Initial Conditions on Decaying Grid Turbulence  PhD (Mechanical Engineering), College of Engineering, Science and Environment, The University of Newcastle  Principal Supervisor 
2004  PhD  Effect of Suction on a Turbulent Boundary Layer  PhD (Mechanical Engineering), College of Engineering, Science and Environment, The University of Newcastle  Principal Supervisor 
2002  PhD  The Turbulent Kinetic Energy in Boundary Layers and Grid Turbulence  PhD (Mechanical Engineering), College of Engineering, Science and Environment, The University of Newcastle  CoSupervisor 
Professor Lyazid Djenidi
Position
Professor
Turbulence Research Group
School of Engineering
College of Engineering, Science and Environment
Focus area
Mechanical Engineering
Contact Details
lyazid.djenidi@newcastle.edu.au  
Phone  (02) 4921 6184 
Fax  (02) 4921 6946 
Office
Room  ES 416 

Building  Engineering Science  D.W. George 
Location  Callaghan University Drive Callaghan, NSW 2308 Australia 