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Research interests

I direct the Simulations of Flow Physics and Acoustics (SOFIA) Laboratory. Our group's research inclinations fall into the categories of fluid dynamics and acoustics. We are particularly interested in:

• The fluid mechanics of insect and aquatic locomotion.
• Physics and control of flow interactions with moving, deforming boundaries.
• Numerical simulation of transitional and turbulent hypersonic boundary layer flows.
• The interaction of sound and fluid flow.
• Development of novel computational methods for investigating unsteady flow physics.
• Control of acoustically-driven instabilities.

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Teaching

• MAE 103 Elementary Fluid Mechanics, Fall 2005
• MAE 150A Intermediate Fluid Mechanics, Winter 2005, 2007
• MAE 153A Engineering Acoustics, Spring 2004, 2006, 2008
• MAE 157 Basic Mechanical Engineering Laboratory, Winter 2004
• MAE 250A Foundations of Fluid Dynamics, Fall 2004, 2006, 2007
• MAE 250E Spectral Methods in Fluid Dynamics, Spring 2005
• MAE 259A/150D Fluid Dynamics of Biological Systems, Winter 2006, 2008

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Publications

Journals

Wilson, M. M., Peng, J., Dabiri, J. O. and Eldredge, J. D. [2008], ``Lagrangian coherent structures in low Reynolds number swimming,'' submitted to J. Phys.: Condens. Matter,

Eldredge, J. D. and Pisani, D. [2008], ``Passive propulsion of a simple articulated system in the wake of an obstacle,'' J. Fluid Mech., 607, 279-288. (pdf, 404 Kb)

Zhang, J. L. and Eldredge, J. D. [2008], ``A viscous vortex particle method for deforming bodies, with application to biolocomotion,'' Int. J. Numer. Meth. Fluids, doi:10.1002/fld.1867. (pdf, 1348 Kb)

Toomey, J. and Eldredge, J. D. [2008], ``Numerical and experimental study of the fluid dynamics of a flapping wing with low order flexibility,'' Phys. Fluids, 20, 073603. (pdf, 2245 Kb)

Eldredge, J. D. [2008], ``Dynamically coupled fluid-body interactions in vorticity-based numerical simulations,'' J. Comput. Phys., 227, 9170--9194, doi:10.1016/j.jcp.2008.03.033. (pdf, 1263 Kb)

Shukla, R. K. and Eldredge, J. D. [2007], ``An inviscid model for vortex shedding from a deforming body,'' Theor. Comput. Fluid Dyn, 21, 343--368. (pdf, 2402 Kb)

Eldredge, J. D. [2007], ``Numerical simulation of the fluid dynamics of 2D rigid body motion with the vortex particle method,''J. Comput. Phys., 221(2): 626--648. .(pdf, 3445 Kb)

Eldredge, J. D. [2007], ``The dynamics and acoustics of viscous two-dimensional leapfrogging vortices,'' J. Sound Vib., 301, 74--92. (pdf, 2243 Kb)

Eldredge, J. D. [2006], ``Numerical simulations of undulatory swimming at moderate Reynolds number," Bioinspir. Biomim. 1. (pdf, 1566 Kb)

Eldredge, J. D. [2004], ``On the interaction of higher duct modes with a perforated liner system with bias flow,'' J. Fluid Mech., 510: 303--331.(pdf, 312 Kb)

Eldredge, J. D. and A. P. Dowling [2003],``The absorption of axial acoustic waves by a perforated liner with bias flow,'' J. Fluid Mech., 485:307--335.(pdf, 284 Kb)

Eldredge, J. D., T. Colonius and A. Leonard [2002], ``A dilating vortex particle method for compressible flow,'' J. Turbul., 3, art no 036.(pdf, 1112 Kb)

Eldredge, J. D., A. Leonard and T. Colonius [2002], ``A general deterministic treatment of derivatives in particle methods,'' J. Comput. Phys., 180 (2):686-709.(pdf, 388 Kb)

Eldredge, J. D., T. Colonius and A. Leonard [2002], ``A vortex particle method for two-dimensional compressible flow,'' J. Comput. Phys., 179(2):371--399. (pdf, 704 Kb)

Conference Papers and Presentations

J. Eldredge, M. Wilson and D. Hector, ``An Exploration of Passive and Active Flexibility in Biolocomotion through Analysis of Canonical Problems,'' CIMTEC 2008, 3rd International Conference, Smart Materials, Structures, Systems, Acireale, Italy, 8-13 June 2008. Advances in Science and Technology, 58, 212--219. (pdf, 893 Kb)

J. Eldredge, D. Hector and S. Kelly, ``Computations of Wake Dynamics in a Simple Model for Fish Schooling,'' presented at the SIAM Conference on Applications of Dynamical Systems, Snowbird, Utah, 28 May-1 June 2007.

J. Eldredge and D. Bodony, ``Numerical Investigation of the Acoustic Behavior of a Multi-perforated liner,'' presented at the 13th AIAA/CEAS Aeroacoustics Conference, Rome, 21-23 May 2007. AIAA Paper 2007-3683. (pdf, 643 Kb)

S. F. Rehman and J. D. Eldredge, ``Numerical investigation of a bias-flow perforated liner for damping of thermoacoustic instabilities,'' presented at ASME Turbo Expo 2007, Montreal, May 2007. GT2007-27319 (pdf, 199 Kb)

J. Toomey and J. D. Eldredge, ``Numerical and experimental investigation of the role of flexibility in flapping wing flight,'' presented at 36th Fluid Dynamics Conference and Exhibit, San Francisco, June 2006. AIAA Paper 2006-3211 (pdf, 1.2 M)

J. D. Eldredge, ``Viscous simulation of moving rigid bodies for investigations of flying and swimming,'' presented at 2005 SIAM Annual Meeting, Minisymposium on Control Theory for Fluid Flows, New Orleans, July 2005.

J. D. Eldredge, ``Simulating the dynamics and acoustics of vortex interactions with a compressible vortex particle method,'' presented at 2005 SIAM Annual Meeting, Minisymposium on Computational Aspects of Transport Phenomena, New Orleans, July 2005.

J. D. Eldredge, ``The acoustics of two-dimensional leapfrogging vortices,'' presented at 11th AIAA/CEAS Aeroacoustics Conference, Monterey, May 2005. AIAA Paper 2005-2954 (pdf, 1.8 M)

J. D. Eldredge, ``Efficient tools for the simulation of flapping wing flows,'' presented at 43rd AIAA Aerospace Sciences Meeting, Reno, January 2005. AIAA Paper 2005-0085 (pdf, 2.0 M)

J. D. Eldredge, ``The acoustics of two-dimensional leapfrogging vortex interactions,'' presented at the 21st ICTAM, Warsaw, Poland, August 15--21, 2004.

J. D. Eldredge and A. P. Dowling, ``Acoustic absorption by a perforated liner with mean bias flow,'' presented at the Fifth EUROMECH Fluid Mechanics Conference, 24--28 August 2003.

J. D. Eldredge, T. Colonius and A. Leonard, ``A Dilating Vortex Particle Method for Compressible Flow,'' presented at the 4th International Workshop on Vortex Flows and Related Numerical Methods, 17-21 March 2002, Santa Barbara.

J. Eldredge, T. Colonius and A. Leonard 2001, ``A vortex method for 2D compressible flow,'' presented at the 15th AIAA Computational Fluid Dynamics Conference, Anaheim. AIAA Paper 2001-2641. (pdf, 554 K)

J. Eldredge, T. Colonius and A. Leonard 2000, ``A vortex particle method for compressible flows,'' presented at ICTAM 2000, Chicago, August 2000.

Reports

J. Eldredge, M. Shoeybi and D. Bodony, ``Numerical investigation of the acoustic behavior of a multi-perforated liner,'' Proceedings of the 2006 Summer Program, Center for Turbulence Research, Stanford University. (pdf, 471 K)

S. Mendez, J. Eldredge, F. Nicoud, T. Poinsot, M. Shoeybi and G. Iaccarino, ``Numerical investigation and preliminary modeling of a turbulent flow over a multi-perforated plate,'' Proceedings of the 2006 Summer Program, Center for Turbulence Research, Stanford University. (pdf, 1.1 M)

J. D. Eldredge, ``A Dilating Vortex Particle Method for Compressible Flow with Application to Aeroacoustics,'' Ph. D. thesis, July 2001. (pdf, 3282 K)

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Personal Information

I was born and raised in the Pacific Northwest of the United States. In October 2000 I was married in Las Vegas to Mina. You can see our wedding pictures here. We have some other recent photos here.

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Honors and Awards

• NSF Faculty Early Career Development (CAREER) Award, 2007-2012.
• Susan and Henry Samueli MAE Teaching Award, June 2006.
• Richard Bruce Chapman Memorial Award for distinguished research by a graduate student in hydrodynamics, June 2002.
• GSC Teaching Assistant Award, June 2000.
• NSF Graduate Research Fellow, 1996-2000.
• ASME Student of the Year, Cornell University, May 1996.

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Contact Information

MAE Department
UCLA
48-121A Engineering IV
420 Westwood Plaza
Box 951597
Los Angeles, CA 90095-1597
United States

Phone: +1 (310) 206-5094
Fax: +1 (310) 206-4830
Email: eldredge at seas dot ucla dot edu