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Finite element computation of a turbulent flow over a two‐dimensional backward‐facing step
Author(s) -
Autret A.,
Grandotto M.,
Dekeyser I.
Publication year - 1987
Publication title -
international journal for numerical methods in fluids
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.938
H-Index - 112
eISSN - 1097-0363
pISSN - 0271-2091
DOI - 10.1002/fld.1650070202
Subject(s) - turbulence , computation , finite element method , mechanics , galerkin method , flow (mathematics) , computational fluid dynamics , k epsilon turbulence model , mathematics , physics , classical mechanics , geometry , algorithm , thermodynamics
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.