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Finite element computation of a turbulent flow over a two-dimensional backward-facing step
Authors:A. Autret  M. Grandotto  I. Dekeyser
Abstract:The present paper is devoted to the computation of turbulent flows by a Galerkin finite element method. Effects of turbulence on the mean field are taken into account by means of a (k-ε) turbulence model. The wall region is treated through wall laws and, more specifically, Reichardt's law. An inlet profile for ε is proposed as a numerical treatment for physically meaningless values of k and ε. Results obtained for a recirculating flow in a two-dimensional channel with a sudden expansion in width are presented and compared with experimental values.
Keywords:(k-ε  ) Turbulence Model  Galerkin Finite Element Method  Penalty Function Approach  Wall Law Backward-facing Step
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