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2002-28

The behaviour of the rational LES model in a two--dimensional mixing layer problem

by Volker John.


Series: 2002-28, Preprints

MSC:
76F99 None of the above, but in this section

Abstract:
The paper presents the first numerical study of the rational LES model
proposed by Galdi and Layton (2000) at a high Reynolds number flow. Two variants
of this model, differing in the model for the subgrid scale tensor,
and the Smagorinsky model are studied at a 2d mixing layer
problem. After having performed a DNS on a very fine grid, the
filtered DNS solution is compared to the solutions obtained with the
LES models on a coarse grid. The rational LES model
with a subgrid scale model proposed by Iliescu and Layton (1998) gives by far the best
results.

Keywords:
large eddy simulation, rational LES model, Smagorinsky model, mixing layer problem