MIE Seminar
SPEAKER: Krishnan Mahesh, University of Minnesota
TITLE:
Simulating Turbulent Flows in Complex Geometries
DATE: Thursday, March 2, 2006
TIME: 12:00 Noon
PLACE: 2005 MEL
ABSTRACT
Direct numerical (DNS) and large-eddy simulation (LES) have
traditionally been restricted to fairly simple geometries. The first
part of the talk will discuss our work on developing the capability to
reliably perform such simulations in engineering configurations.
Special attention has been paid to ensuring robustness and accuracy at
high Reynolds numbers without numerical dissipation. The talk will
briefly describe our incompressible algorithm (Mahesh et al. 2004, J.
Comput. Phys., vol. 197) and present some representative solutions. We
have recently extended this capability to compressible flows (Hou &
Mahesh 2005, J. Comput. Phys., vol. 205) and will discuss the basic
ideas. The second part of the talk will discuss ongoing work on the
direct numerical simulation and modeling of mixing by turbulent jets in
cross-flow. The simulation results will be compared to experiment, and
used to comment on the entrainment mechanisms of the jet. Also, an
analytical model for jet trajectory, and a simple kinematic model
BIOGRAPHY
Dr. Mahesh is currently an Associate Professor in the Department of
Aerospace Engineering and Mechanics at the University of Minnesota,
where he has been on the faculty since 2000. He received his Bachelor's
degree in Mechanical Engineering from the India Institute of
Technology, Mumbai and his Master's and Ph.D. degrees from Stanford
University, where he studied shock waves in turbulent flows using
direct numerical simulations and linear analysis. He then spent
additional time at Stanford as a research associate in the Center for
Turbulence Research performing combustor simulations as part of the
Stanford ASC program. He is currently involved in the computation,
analysis, and modeling of turbulent flows.