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 LES 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, Accepted
for publication in J. Comput. Phys.) and will discuss the basic ideas. The
second part of the talk will discuss ongoing work on turbulent jets in
crossflow. We (Muppidi & Mahesh, 2005, Accepted for publication in J. Fluid
Mech.) have developed an analytical scaling for jet trajectory that accounts
for jet velocity profile and crossflow boundary layer thickness. Also direct
numerical simulation has been performed under conditions corresponding to
recent experiments (Muppidi & Mahesh, AIAA 2005-1115). Results from the
simulations will be discussed.
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