Large-Eddy Simulation of Turbulent Flows(ME EN 7960-003) Fall 2014 |
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Course Description:This
course
covers topics related to Large-Eddy
Simulation (LES).
An advanced Computational
Fluid Dynamics
(CFD) technique. LES
is quickly replacing traditional Reynolds
Averaged Navier-Stokes
(RANS) modeling as the
method of choice for researchers and practitioners studying
turbulent fluid flow phenomena in engineering and
environmental problems. LES explicitly solves for
the larger scale turbulent motions that are highly dependent
on boundary conditions (e.g., geometry, large scale forcing)
while using a turbulence model only for the smaller (and
presumably more universal) motions. This is a distinct
advantage over traditional RANS models where the effects of
turbulence on the flow field are entirely dependent on the
turbulence parameterizations.
This course will provide students with an introduction to the concepts and principles of the LES technique for numerical simulation of turbulent flows. The course will start by discussing filtering and the turbulence closure problem in the context of LES. It will then move on to derive and examine the filtered forms of the governing equations. Modeling the effect of unresolved turbulence, with SubGrid-Scale (SGS) models, will constitute a significant portion of the course content. Students will learn how to formulate SGS models, how to test SGS models off-line with experimental data and evaluate the performance of SGS models from the results of turbulent flow simulations. The last part of the class will examine issues pertaining to LES of specific flow cases of interest to the class. For example, this might include wall-boundary conditions for wall bounded flows , turbulent inlet and exit conditions, SGS models for high-Reynolds number flows, Lagrangian particle methods for LES, and SGS modeling for turbulent reacting flows. Time permitting, other topics specific to student interests will be covered. |
Instructor: Rob Stoll | Lecture: T, Th 3:40-5:00pm in WEB 2470 | Course Web Site |