Conjoint Associate Professor Raj Rajagopalan

Conjoint Associate Professor

School of Engineering (Mechanical Engineering)

Career Summary

Biography

Research Expertise
Mechanical engineering

Qualifications

  • PhD, Indian Institute of Science
  • Bachelor of Engineering, University of Madras
  • Master of Engineering, Indian Institute of Science

Keywords

  • Mechanical Engineering

Fields of Research

Code Description Percentage
010599 Mathematical Physics not elsewhere classified 20
091599 Interdisciplinary Engineering not elsewhere classified 20
091399 Mechanical Engineering not elsewhere classified 60

Professional Experience

UON Appointment

Title Organisation / Department
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Publications

For publications that are currently unpublished or in-press, details are shown in italics.


Journal article (14 outputs)

Year Citation Altmetrics Link
2013 Rajagopalan S, Antonia RA, Djenidi L, 'Effect of mesh grids on the turbulent mixing layer of an axisymmetric jet', Heat Transfer Engineering, 34 1216-1225 (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 hot-wire 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 locations-one 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, high-speed 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 Kelvin-Helmholtz 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, second-and third-order 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 second-order structure function of u than on that of v. The third-order 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 large-scale vortices that are formed at the edge of the grids play a significant role in the transfer of energy. © 2013 Taylor & Francis Group, LLC.

DOI 10.1080/01457632.2013.776908
Citations Scopus - 1Web of Science - 1
Co-authors Lyazid Djenidi, Robert Antonia
2012 Lee S-J, Kim H-L, Lee J-P, Rajagopalan SR, 'Jet flow characteristics of sinusoidal wavy nozzles', Journal of Mechanical Science and Technology, 26 4007-4016 (2012) [C1]
2007 Xu G, Zhou T, Rajagopalan SR, 'Similarity of intermittency characteristics of temperature and transverse velocity', Physical Review E - Statistical, Nonlinear, and Soft Matter Physics, 76 (2007) [C1]
DOI 10.1103/physreve.76.046302
2007 Rajagopalan SR, Antonia RA, 'Turbulence and drag control in jet and wake flows', Sadhana - Academy Proceedings in Engineering Sciences, 32 133-144 (2007) [C1]
DOI 10.1007/s12046-007-0012-z
Citations Scopus - 1Web of Science - 1
Co-authors Robert Antonia
2007 Xu G, Antonia RA, Rajagopalan SR, 'Scaling of mixed longitudinal-transverse velocity structure functions', Europhysics Letters, 79 44001 (2007) [C1]
DOI 10.1209/0295-5075/79/44001
Citations Scopus - 1Web of Science - 3
Co-authors Robert Antonia
2005 Rajagopalan SR, Antonia RA, 'Flow around a circular cylinder - structure of the near wake shear layer', Experiments in Fluids, 38 393-402 (2005) [C1]
DOI 10.1007/s00348-004-0913-0
Citations Scopus - 40Web of Science - 36
Co-authors Robert Antonia
2004 Burattini P, Antonia RA, Rajagopalan SR, Stephens ML, 'Effect of initial conditions on the near-field development of a round jet', Experiments in Fluids, 37 56-64 (2004) [C1]
DOI 10.1007/s00348-004-0784-4
Citations Scopus - 26Web of Science - 23
Co-authors Robert Antonia
2003 Olsen JF, Rajagopalan SR, Antonia RA, 'Jet column modes in both a plane jet and a passively modified plane jet subject to acoustic excitation', Experiments in Fluids, 278-287 (2003) [C1]
DOI 10.1007/s00348-003-0663-4
Citations Scopus - 4Web of Science - 3
Co-authors Robert Antonia
2001 Xu G, Antonia RA, Rajagopalan SR, 'Sweeping decorrelation hypothesis in a turbulent round jet', Fluid Dynamics Research, 28 311-321 (2001) [C1]
Citations Scopus - 3Web of Science - 3
Co-authors Robert Antonia
2000 Xu G, Rajagopalan SR, Antonia RA, 'Approach to isotropy in a smooth wall turbulent boundary layer', Fluid Dynamics Research, 26 1-11 (2000) [C1]
Citations Scopus - 3Web of Science - 4
Co-authors Robert Antonia
2000 Xu G, Antonia RA, Rajagopalan SR, 'Scaling of mixed longitudinal velocity-temperature structure functions', Europhysics Letters, 49 452-458 (2000) [C1]
Citations Web of Science - 10
Co-authors Robert Antonia
2000 Xu G, Antonia RA, Rajagopalan SR, 'Scaling of mean temperature dissipation rate', Physics of Fluids, 12 3090-3093 (2000) [C1]
Citations Scopus - 5Web of Science - 5
Co-authors Robert Antonia
1998 Rajagopalan SR, Antonia RA, 'Turbulence Reduction in the Mixing Layer of a Plane Jet Using Small Cylinders', Experiments in Fluids, 25 96-103 (1998) [C1]
Citations Scopus - 15Web of Science - 9
Co-authors Robert Antonia
1998 Rajagopalan SR, Zhou T, Antonia RA, 'Three-component turbulence measurementsusing a four-wire probe', Flow Measurement and Instrumentation, 9 211-216 (1998) [C1]
Citations Scopus - 2Web of Science - 1
Co-authors Robert Antonia
Show 11 more journal articles

Review (1 outputs)

Year Citation Altmetrics Link
1999 Olsen JF, Rajagopalan SR, Antonia RA, 'Control of Jet Turbulence', Recent Research Developments in Fluid Dynamics Vol. 2 (1999) [D1]
Co-authors Robert Antonia

Conference (19 outputs)

Year Citation Altmetrics Link
2011 Lee S-K, 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]
DOI 10.1088/1742-6596/318/5/052046
Co-authors Robert Antonia, Lyazid Djenidi
2007 Hanson RE, Rajagopalan SR, Antonia RA, 'Characteristics of the wake of tandem cylinders with different and equal diameters', Collection of Technical Papers: 37th AIAA Fluid Dynamics Conference, Miami, Florida (2007) [E2]
Co-authors Robert Antonia
2006 Rajagopalan SR, Antonia RA, 'Turbulence and drag control in jet and wake flows', Proceedings of the discussion meeting on flow control and diagnostics, Bangalore, Coorg, India (2006) [E1]
Co-authors Robert Antonia
2006 Parker R, Lavoie PLD, Rajagopalan SR, Antonia RA, 'Mixing layer excitation in an axisymmetric jet using piezoelectric actuators', European drag reduction and flow control meeting, Ischia, Italy (2006) [E1]
Co-authors Robert Antonia
2006 Rajagopalan SR, 'Passive Control of an Axisymmetric Jet Using Grids', NCFMFP 2006 (CD-Rom), Bombay (2006) [E1]
2004 Burattini P, Antonia RA, Rajagopalan SR, 'Effect of initial conditions on the far field of a round jet', Proceedings of the Fifteenth Australasian Fluid Mechanics Conference, University of Sydney (2004) [E1]
Co-authors Robert Antonia
2004 Lehman RP, Rajagopalan SR, Burattini P, Antonia RA, 'Axisymmetric jet control using passive grids', Proceedings of the Fifteenth Australasian Fluid Mechanics Conference, University of Sydney (2004) [E1]
Co-authors Robert Antonia
2004 Stephens ML, Rajagopalan SR, Burattini P, Antonia RA, 'Axisymmetric shear flow behind a honeycomb', Proceedings of The Tenth Asian Congress of Fluid Mechanics, University of Peradeniya (2004) [E1]
Co-authors Robert Antonia
2003 Olsen JF, Rajagopalan SR, Antonia RA, 'Preferred Modes and Jet Column Modes in a Plane Jet and in a Passively Modified Plane Jet', Turbulence, Heat and Mass Transfer, Antalya, Turkey (2003) [E2]
Co-authors Robert Antonia
2001 Parker R, Rajagopalan SR, Antonia RA, 'Control of an Axisymmetric Jet using a Passive Ring', Proceedings of the Fourteenth Australasian Fluid Mechanics Conference Volume II, Adelaide, Australia (2001) [E1]
Citations Scopus - 9Web of Science - 5
Co-authors Robert Antonia
2001 Grubb C, Rajagopalan SR, 'The Influence of the Nozzle Outlet Shape on Swirl Flow', Proceedings of the Fourteenth Australasian Fluid Mechanics Conference, Adelaide, Australia (2001) [E1]
2001 Parker R, Antonia RA, Rajagopalan SR, 'Turbulence control in a plane jet using a piezoelectric excitation device', Turbulence and Shear Flow Phenomena Volume II, Stockholm (2001) [E2]
Co-authors Robert Antonia
1999 Olsen JF, Rajagopalan SR, Antonia RA, 'Turbulence Reduction in the Initial Region of a Plane Jet Using Passive Control', IUTAM Symposium on Mechanics of Passive and Active Flow Control, Gottingen (1999) [E1]
Citations Web of Science - 1
Co-authors Robert Antonia
1999 Xu G, Antonia RA, Rajagopalan SR, 'Scaling of Mixed Longitudinal-Transverse Velocity Structure Functions', Proceedings of the Eighth Asian Congress of Fluid Mechanics, Shenzhen (1999) [E1]
Co-authors Robert Antonia
1999 Henry P, Olsen JF, Rajagopalan SR, 'Passive control of shear layer turbulence in a plane jet', Proceedings of the Eighth Asian Congress of Fluid Mechanics, Shenzhen (1999) [E1]
1998 Grubb C, Rajagopalan SR, 'Investigations of a Plane Lip Jet From a Narrow Slit', Proceedings of 13th Australasian Fluid Mechanics Conference (2 volumes), Melhbourne (1998) [E1]
1998 Tam YS, Olsen JF, Rajagopalan SR, 'Feedback Control of Vortex Shedding From a Circular Cylinder', Proceedings of 13th Australasian Fluid Mechanics Conference (2 volumes), Melbourne, Australia (1998) [E1]
1998 Olsen JF, Rajagopalan SR, 'Hot Wire Measurements in the Wake of Modified Circular Cylinders', Proceedings of the 13th Australasian Fluid Mechanics Conference (2 volumes), Melbourne (1998) [E1]
1998 Xu G, Antonia RA, Rajagopalan SR, 'The Sweeping DEcorrelation Hypothesis and Anisotropy in a Turbulent Jet at Moderate Reynolds Numbers', Proceedings of the 13th Australasian Fluid Mechanics Conference (2 volumes), Melbourne (1998) [E1]
Co-authors Robert Antonia
Show 16 more conferences
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Grants and Funding

Summary

Number of grants 16
Total funding $608,728

Click on a grant title below to expand the full details for that specific grant.


20061 grants / $1,600

Workshop on Flow Control and Diagnostics$1,600

Funding body: University of Newcastle

Funding body University of Newcastle
Project Team Conjoint Associate Professor Raj Rajagopalan
Scheme Travel Grant
Role Lead
Funding Start 2006
Funding Finish 2006
GNo G0186133
Type Of Funding Internal
Category INTE
UON Y

20051 grants / $3,311

Active Control of Cylinder Wake Shear Layer Dynamics$3,311

Funding body: University of Newcastle

Funding body University of Newcastle
Project Team Conjoint Associate Professor Raj Rajagopalan
Scheme Project Grant
Role Lead
Funding Start 2005
Funding Finish 2005
GNo G0184683
Type Of Funding Internal
Category INTE
UON Y

20041 grants / $4,714

Influence of nozzle shape on synthetic jets$4,714

Funding body: University of Newcastle

Funding body University of Newcastle
Project Team Conjoint Associate Professor Raj Rajagopalan
Scheme Project Grant
Role Lead
Funding Start 2004
Funding Finish 2004
GNo G0183413
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 Investigator
Funding Start 2003
Funding Finish 2003
GNo G0182404
Type Of Funding Internal
Category INTE
UON Y

20021 grants / $9,609

Reverse and bi-directional swirl jet flow from tangential injection nozzles$9,609

Funding body: University of Newcastle

Funding body University of Newcastle
Project Team Conjoint Associate Professor Raj Rajagopalan
Scheme Project Grant
Role Lead
Funding Start 2002
Funding Finish 2002
GNo G0181414
Type Of Funding Internal
Category INTE
UON Y

20012 grants / $6,313

Jet Flow Control using Piezoelectric Smart Structures.$5,000

Funding body: University of Newcastle

Funding body University of Newcastle
Project Team Conjoint Associate Professor Raj Rajagopalan
Scheme Project Grant
Role Lead
Funding Start 2001
Funding Finish 2001
GNo G0179956
Type Of Funding Internal
Category INTE
UON Y

14 Australasian Fluid Mechanics Conference Adelaide 9-14 December, 2001$1,313

Funding body: University of Newcastle

Funding body University of Newcastle
Project Team Conjoint Associate Professor Raj Rajagopalan
Scheme Travel Grant
Role Lead
Funding Start 2001
Funding Finish 2001
GNo G0181576
Type Of Funding Internal
Category INTE
UON Y

20001 grants / $10,000

Control of mixing in a circular jet using a vortex generating spiral jet.$10,000

Funding body: University of Newcastle

Funding body University of Newcastle
Project Team Conjoint Associate Professor Raj Rajagopalan
Scheme Project Grant
Role Lead
Funding Start 2000
Funding Finish 2000
GNo G0178944
Type Of Funding Internal
Category INTE
UON Y

19992 grants / $175,335

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 1999
GNo G0177756
Type Of Funding Aust Competitive - Commonwealth
Category 1CS
UON Y

8th asian Congress on Fluid Mechanics, Shenzhen, China.$1,335

Funding body: University of Newcastle

Funding body University of Newcastle
Project Team Conjoint Associate Professor Raj Rajagopalan
Scheme Travel Grant
Role Lead
Funding Start 1999
Funding Finish 1999
GNo G0180507
Type Of Funding Internal
Category INTE
UON Y

19972 grants / $11,075

Passive and Active Control of a Plane Turbulent Jet.$10,000

Funding body: University of Newcastle

Funding body University of Newcastle
Project Team Conjoint Associate Professor Raj Rajagopalan, Emeritus Professor Robert Antonia
Scheme Project Grant
Role Lead
Funding Start 1997
Funding Finish 1997
GNo G0176713
Type Of Funding Internal
Category INTE
UON Y

Seventh Asian Congress of Fluid Mechanics (Triennial), Madras, India, 8-12 December 1997$1,075

Funding body: University of Newcastle

Funding body University of Newcastle
Project Team Conjoint Associate Professor Raj Rajagopalan
Scheme Travel Grant
Role Lead
Funding Start 1997
Funding Finish 1997
GNo G0179549
Type Of Funding Internal
Category INTE
UON Y

19961 grants / $200,000

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 1996
GNo G0175285
Type Of Funding Aust Competitive - Commonwealth
Category 1CS
UON Y

19951 grants / $9,000

Three Component Vorticity Measurements in a Large Reynolds Number Jet$9,000

Funding body: University of Newcastle

Funding body University of Newcastle
Project Team Conjoint Associate Professor Raj Rajagopalan, Emeritus Professor Robert Antonia
Scheme Project Grant
Role Lead
Funding Start 1995
Funding Finish 1995
GNo G0174976
Type Of Funding Internal
Category INTE
UON Y

19931 grants / $161,979

93,94,95 GRANT. Turbulent Boundary Layer over Riblets.$161,979

Funding body: ARC (Australian Research Council)

Funding body ARC (Australian Research Council)
Project Team Emeritus Professor Robert Antonia, Conjoint Associate Professor Raj Rajagopalan
Scheme Large Grant
Role Investigator
Funding Start 1993
Funding Finish 1993
GNo G0173028
Type Of Funding Aust Competitive - Commonwealth
Category 1CS
UON Y

19921 grants / $10,000

Investigation Of Drag And Reduction In A Turbulent Boudnary Layer Using Riblets$10,000

Funding body: University of Newcastle

Funding body University of Newcastle
Project Team Conjoint Associate Professor Raj Rajagopalan
Scheme Project Grant
Role Lead
Funding Start 1992
Funding Finish 1992
GNo G0174203
Type Of Funding Internal
Category INTE
UON Y
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Research Supervision

Past Supervision

Year Research Title / Program / Supervisor Type
2008 Lattice Boltzmann Simulation of Fluid Mixing in T-Shaped Micromixer
Mechanical Engineering, Faculty of Engineering and Built Environment
Co-Supervisor
2007 Turbulence Control in Jet Flow
Mechanical Engineering, Faculty of Engineering and Built Environment
Sole Supervisor
2003 Swirl Jet from a Tangential Injection Nozzle
Mechanical Engineering, Faculty of Engineering and Built Environment
Sole Supervisor
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Conjoint Associate Professor Raj Rajagopalan

Position

Conjoint Associate Professor
School of Engineering
Faculty of Engineering and Built Environment

Focus area

Mechanical Engineering

Contact Details

Email sundara.rajagopalan@newcastle.edu.au
Phone (02) 4921 6201

Office

Room ES430
Building Engineering S
Location Callaghan
University Drive
Callaghan, NSW 2308
Australia
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