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

CodeDescriptionPercentage
010599Mathematical Physics not elsewhere classified20
091599Interdisciplinary Engineering not elsewhere classified20

Professional Experience

UON Appointment

DatesTitleOrganisation / Department
27/02/2012 - 30/06/2012Casual AcademicUniversity of Newcastle
School of Engineering
Australia
18/12/2010 - 30/04/2011Research AssociateUniversity of Newcastle
School of Engineering
Australia
1/01/2002 - 21/12/2006Senior LecturerUniversity of Newcastle
School of Engineering
Australia
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Publications

For publications that are currently unpublished or in-press, details are shown in italics.


Journal article (14 outputs)

YearCitationAltmetricsLink
2013Rajagopalan 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.

DOI10.1080/01457632.2013.776908
CitationsScopus - 1Web of Science - 1
Co-authorsLyazid Djenidi, Robert Antonia
2012Lee 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]
2007Xu 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]
DOI10.1103/physreve.76.046302
2007Rajagopalan SR, Antonia RA, 'Turbulence and drag control in jet and wake flows', Sadhana - Academy Proceedings in Engineering Sciences, 32 133-144 (2007) [C1]
DOI10.1007/s12046-007-0012-z
CitationsScopus - 1Web of Science - 1
Co-authorsRobert Antonia
2007Xu G, Antonia RA, Rajagopalan SR, 'Scaling of mixed longitudinal-transverse velocity structure functions', Europhysics Letters, 79 44001 (2007) [C1]
DOI10.1209/0295-5075/79/44001
CitationsScopus - 1Web of Science - 2
Co-authorsRobert Antonia
2005Rajagopalan SR, Antonia RA, 'Flow around a circular cylinder - structure of the near wake shear layer', Experiments in Fluids, 38 393-402 (2005) [C1]
DOI10.1007/s00348-004-0913-0
CitationsScopus - 39Web of Science - 36
Co-authorsRobert Antonia
2004Burattini 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]
DOI10.1007/s00348-004-0784-4
CitationsScopus - 26Web of Science - 22
Co-authorsRobert Antonia
2003Olsen 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]
DOI10.1007/s00348-003-0663-4
CitationsScopus - 4Web of Science - 3
Co-authorsRobert Antonia
2001Xu G, Antonia RA, Rajagopalan SR, 'Sweeping decorrelation hypothesis in a turbulent round jet', Fluid Dynamics Research, 28 311-321 (2001) [C1]
CitationsScopus - 3Web of Science - 3
Co-authorsRobert Antonia
2000Xu G, Rajagopalan SR, Antonia RA, 'Approach to isotropy in a smooth wall turbulent boundary layer', Fluid Dynamics Research, 26 1-11 (2000) [C1]
CitationsScopus - 3Web of Science - 4
Co-authorsRobert Antonia
2000Xu G, Antonia RA, Rajagopalan SR, 'Scaling of mixed longitudinal velocity-temperature structure functions', Europhysics Letters, 49 452-458 (2000) [C1]
CitationsWeb of Science - 9
Co-authorsRobert Antonia
2000Xu G, Antonia RA, Rajagopalan SR, 'Scaling of mean temperature dissipation rate', Physics of Fluids, 12 3090-3093 (2000) [C1]
CitationsScopus - 5Web of Science - 5
Co-authorsRobert Antonia
1998Rajagopalan SR, Antonia RA, 'Turbulence Reduction in the Mixing Layer of a Plane Jet Using Small Cylinders', Experiments in Fluids, 25 96-103 (1998) [C1]
CitationsScopus - 15Web of Science - 9
Co-authorsRobert Antonia
1998Rajagopalan SR, Zhou T, Antonia RA, 'Three-component turbulence measurementsusing a four-wire probe', Flow Measurement and Instrumentation, 9 211-216 (1998) [C1]
CitationsScopus - 2Web of Science - 1
Co-authorsRobert Antonia
Show 11 more journal articles

Review (1 outputs)

YearCitationAltmetricsLink
1999Olsen JF, Rajagopalan SR, Antonia RA, 'Control of Jet Turbulence', Recent Research Developments in Fluid Dynamics Vol. 2 (1999) [D1]
Co-authorsRobert Antonia

Conference (19 outputs)

YearCitationAltmetricsLink
2011Lee 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]
DOI10.1088/1742-6596/318/5/052046
Co-authorsRobert Antonia, Lyazid Djenidi
2007Hanson 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-authorsRobert Antonia
2006Rajagopalan 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-authorsRobert Antonia
2006Parker 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-authorsRobert Antonia
2006Rajagopalan SR, 'Passive Control of an Axisymmetric Jet Using Grids', NCFMFP 2006 (CD-Rom), Bombay (2006) [E1]
2004Burattini 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-authorsRobert Antonia
2004Lehman 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-authorsRobert Antonia
2004Stephens 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-authorsRobert Antonia
2003Olsen 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-authorsRobert Antonia
2001Parker 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]
CitationsScopus - 9Web of Science - 5
Co-authorsRobert Antonia
2001Grubb 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]
2001Parker 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-authorsRobert Antonia
1999Olsen 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]
CitationsWeb of Science - 1
Co-authorsRobert Antonia
1999Xu 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-authorsRobert Antonia
1999Henry 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]
1998Grubb 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]
1998Tam 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]
1998Olsen 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]
1998Xu 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-authorsRobert Antonia
Show 16 more conferences
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Grants and Funding

Summary

Number of grants16
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 bodyUniversity of Newcastle
Project TeamConjoint Associate Professor Raj Rajagopalan
SchemeTravel Grant
RoleLead
Funding Start2006
Funding Finish2006
GNoG0186133
Type Of FundingInternal
CategoryINTE
UONY

20051 grants / $3,311

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

Funding body: University of Newcastle

Funding bodyUniversity of Newcastle
Project TeamConjoint Associate Professor Raj Rajagopalan
SchemeProject Grant
RoleLead
Funding Start2005
Funding Finish2005
GNoG0184683
Type Of FundingInternal
CategoryINTE
UONY

20041 grants / $4,714

Influence of nozzle shape on synthetic jets$4,714

Funding body: University of Newcastle

Funding bodyUniversity of Newcastle
Project TeamConjoint Associate Professor Raj Rajagopalan
SchemeProject Grant
RoleLead
Funding Start2004
Funding Finish2004
GNoG0183413
Type Of FundingInternal
CategoryINTE
UONY

20031 grants / $5,792

Control of turbulent flows.$5,792

Funding body: University of Newcastle

Funding bodyUniversity of Newcastle
Project TeamProfessor Lyazid Djenidi, Conjoint Associate Professor Raj Rajagopalan
SchemeProject Grant
RoleInvestigator
Funding Start2003
Funding Finish2003
GNoG0182404
Type Of FundingInternal
CategoryINTE
UONY

20021 grants / $9,609

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

Funding body: University of Newcastle

Funding bodyUniversity of Newcastle
Project TeamConjoint Associate Professor Raj Rajagopalan
SchemeProject Grant
RoleLead
Funding Start2002
Funding Finish2002
GNoG0181414
Type Of FundingInternal
CategoryINTE
UONY

20012 grants / $6,313

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

Funding body: University of Newcastle

Funding bodyUniversity of Newcastle
Project TeamConjoint Associate Professor Raj Rajagopalan
SchemeProject Grant
RoleLead
Funding Start2001
Funding Finish2001
GNoG0179956
Type Of FundingInternal
CategoryINTE
UONY

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

Funding body: University of Newcastle

Funding bodyUniversity of Newcastle
Project TeamConjoint Associate Professor Raj Rajagopalan
SchemeTravel Grant
RoleLead
Funding Start2001
Funding Finish2001
GNoG0181576
Type Of FundingInternal
CategoryINTE
UONY

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 bodyUniversity of Newcastle
Project TeamConjoint Associate Professor Raj Rajagopalan
SchemeProject Grant
RoleLead
Funding Start2000
Funding Finish2000
GNoG0178944
Type Of FundingInternal
CategoryINTE
UONY

19992 grants / $175,335

Management of Turbulent Shear Flows$174,000

Funding body: ARC (Australian Research Council)

Funding bodyARC (Australian Research Council)
Project TeamEmeritus Professor Robert Antonia, Professor Lyazid Djenidi, Conjoint Associate Professor Raj Rajagopalan
SchemeLarge Grant
RoleInvestigator
Funding Start1999
Funding Finish1999
GNoG0177756
Type Of FundingAust Competitive - Commonwealth
Category1CS
UONY

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

Funding body: University of Newcastle

Funding bodyUniversity of Newcastle
Project TeamConjoint Associate Professor Raj Rajagopalan
SchemeTravel Grant
RoleLead
Funding Start1999
Funding Finish1999
GNoG0180507
Type Of FundingInternal
CategoryINTE
UONY

19972 grants / $11,075

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

Funding body: University of Newcastle

Funding bodyUniversity of Newcastle
Project TeamConjoint Associate Professor Raj Rajagopalan, Emeritus Professor Robert Antonia
SchemeProject Grant
RoleLead
Funding Start1997
Funding Finish1997
GNoG0176713
Type Of FundingInternal
CategoryINTE
UONY

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

Funding body: University of Newcastle

Funding bodyUniversity of Newcastle
Project TeamConjoint Associate Professor Raj Rajagopalan
SchemeTravel Grant
RoleLead
Funding Start1997
Funding Finish1997
GNoG0179549
Type Of FundingInternal
CategoryINTE
UONY

19961 grants / $200,000

EFECTS OF DIFFERENT SURFACE CONDITIONS ON A TURBULENT BOUNDARY LAYER$200,000

Funding body: ARC (Australian Research Council)

Funding bodyARC (Australian Research Council)
Project TeamEmeritus Professor Robert Antonia, Professor Lyazid Djenidi, Conjoint Associate Professor Raj Rajagopalan
SchemeLarge Grant
RoleInvestigator
Funding Start1996
Funding Finish1996
GNoG0175285
Type Of FundingAust Competitive - Commonwealth
Category1CS
UONY

19951 grants / $9,000

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

Funding body: University of Newcastle

Funding bodyUniversity of Newcastle
Project TeamConjoint Associate Professor Raj Rajagopalan, Emeritus Professor Robert Antonia
SchemeProject Grant
RoleLead
Funding Start1995
Funding Finish1995
GNoG0174976
Type Of FundingInternal
CategoryINTE
UONY

19931 grants / $161,979

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

Funding body: ARC (Australian Research Council)

Funding bodyARC (Australian Research Council)
Project TeamEmeritus Professor Robert Antonia, Conjoint Associate Professor Raj Rajagopalan
SchemeLarge Grant
RoleInvestigator
Funding Start1993
Funding Finish1993
GNoG0173028
Type Of FundingAust Competitive - Commonwealth
Category1CS
UONY

19921 grants / $10,000

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

Funding body: University of Newcastle

Funding bodyUniversity of Newcastle
Project TeamConjoint Associate Professor Raj Rajagopalan
SchemeProject Grant
RoleLead
Funding Start1992
Funding Finish1992
GNoG0174203
Type Of FundingInternal
CategoryINTE
UONY
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Research Supervision

Past Supervision

YearResearch Title / Program / Supervisor Type
2008Lattice Boltzmann Simulation of Fluid Mixing in T-Shaped Micromixer
Mechanical Engineering, Faculty of Engineering and Built Environment
Co-Supervisor
2007Turbulence Control in Jet Flow
Mechanical Engineering, Faculty of Engineering and Built Environment
Sole Supervisor
2003Swirl 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

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

Office

RoomES430
BuildingEngineering S
LocationCallaghan
University Drive
Callaghan, NSW 2308
Australia
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