Sunil Ahuja

Ph.D. (2009)
Mechanical and Aerospace Engineering
Princeton University

email: sahuja at princeton dot edu

Advisors: Clancy Rowley and Yannis Kevrekidis

Publications

• S. Ahuja. Reduction methods for feedback stabilization of fluid flows. Ph.D. dissertation, Princeton University, May 2009.
• Z. Ma, S. Ahuja and C. W. Rowley. Reduced order models for control of fluids using the Eigensystem Realization Algorithm. (In preparation.)
• S. Ahuja and C. W. Rowley. Feedback control of unstable steady states of flow past a flat plate using reduced-order estimators. Journal of Fluid Mechanics (submitted), February 2009; arXiv:0902.1207v1.
• S. Ahuja, V. Yakhot and I. G. Kevrekidis. Computational coarse graining of a randomly forced 1-D Burgers equation. Physics of Fluids, 20, 035111, 2008; arxiv/0707.0510.
• S. Ahuja, I. G. Kevrekidis and C. W. Rowley. Template-based stabilization of relative equilibria in systems with continuous symmetry. Journal of Nonlinear Science, 17(2): 109-143, 2007.
• S. Ahuja. Low dimensional representations of flow past a cylinder. MS thesis, Boston University, August 2003.

Conference Proceedings

• C. Rowley, T. Colonius, S. Ahuja, and K. Taira. Closed-loop control of leading edge vorticity on a 3D wing: Simulations and low-dimensional models. AIAA Paper 2008-3981, 4th AIAA Flow Control Conference, Seattle, WA, 2008.
• S. Ahuja and C. W. Rowley. Low-dimensional models for feedback stabilization of unstable steady states. AIAA Paper 2008-553, 46th AIAA Aerospace Sciences Meeting and Exhibit, Reno, NV, 2008.
• S. Ahuja, C. W. Rowley, I. G. Kevrekidis, M. Wei, T. Colonius and G. Tadmor. Low-dimensional models for control of leading-edge vortices: Equilibria and linearized models. AIAA Paper 2007-709, 45th AIAA Aerospace Sciences Meeting and Exhibit, Reno, NV, 2007.
• S. Ahuja, I. G. Kevrekidis and C. W. Rowley. Template-based control of relative equilibria in systems with symmetry. Proceedings of the American Control Conference, Minneapolis, MN, 2006.

Presentations

• Z. Ma, S. Ahuja and C. W. Rowley. Reduced order models for control of fluids using the Eigensystem Realization Algorithm. 61st Annual Meeting of the APS Division of Fluid Dynamics, San Antonio, TX, 2008.
• S. Ahuja and C. W. Rowley. Reduced-order models using balanced truncation for feedback control of fluid flows: application to separated flows behind airfoils at low Reynolds numbers. FAA/NASA Joint University Program on Air Transportation Research, Quarterly Review Meeting, Massachusetts Institute of Technology, Boston, MA, October 2008.
• S. Ahuja, I. G. Kevrekidis and C. W. Rowley. Template-based control of relative equilibria in systems with symmetry (poster). Workshop on Applied Dynamics and Geometric Mechanics, Oberwolfach, Germany, July 2008.
• T. Colonius, K. Taira, W. Joe, C. Rowley and S. Ahuja. Integrated toolkit for closed-loop flow control: Flow simulation, reduced- order modeling, and control design. 4th AIAA Flow Control Conference, Seattle, WA, 2008.
• S. Ahuja. Stabilization of unstably steady states in low Reynolds number flows past airfoils. Frontiers in Applied and Computational Mathematics, New Jersey Institute of Technology, Newark, NJ, 2008.
• S. Ahuja and C. W. Rowley. Reduced-order model-based control of unstable steady states in 2D incompressible flow past airfoils at low Reynolds numbers. 60th Annual Meeting of the APS Division of Fluid Dynamics, Salt Lake City, UT, 2007.
• C. W. Rowley, S. Ahuja and M. Ilak. Model reduction near unstable equilibria in fluid flows, using approximate balanced truncation. SIAM Conference on Applications of Dynamical Systems (DS07), Snowbird, Utah, 2007.
• S. Ahuja. Reduced-order models for feedback control of separation in fluids. 3rd Northeast Control Workshop, University of Pennsylvania, Philadelphia, PA, 2007.
• S. Ahuja, C. W. Rowley, M. Wei, I. G. Kevrekidis and T. Colonius. Dynamics of separation over airfoils at low Reynolds numbers, Part I: 2D equilibria and reduced-order models. 59th Annual Meeting of the APS Division of Fluid Dynamics, Tampa, FL, 2006.
• S. Ahuja and P. E. Barbone. Quasi-optimal space-time finite element methods. 7th U.S. National Congress on Computational Mechanics (USNCCM7), Albuqerque, NM, 2003.