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THMT-12. Proceedings of the Seventh International Symposium On Turbulence Heat and Mass Transfer
September, 24-27, 2012, Palermo, Italy

DOI: 10.1615/ICHMT.2012.ProcSevIntSympTurbHeatTransfPal


ISBN Print: 978-1-56700-302-4

ISSN: 2377-2816

An investigation of SGS-stress anisotropy modeling in complex turbulent flow fields

pages 2081-2088
DOI: 10.1615/ICHMT.2012.ProcSevIntSympTurbHeatTransfPal.2150
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要約

An effective model expression for representing the anisotropy of the subgrid-scale (SGS) stress used in large eddy simulation was investigated. The present SGS-stress model was constructed by combining a representative isotropic linear eddy-viscosity model (EVM) with an extra anisotropic term. This extra term was based on a residual term after subtracting an EVM form from the Bardina's SGS-Reynolds-stress model (Bardina et al., AIAA Paper, 80-1357, 1980). The resultant term yields no undesirable energy transfer. Thus, the present anisotropic term is expected to have no serious effect on computational stability, even if highly anisotropic SGS-stress components are returned. In order to discuss the model performance, the present SGS model was applied to a fundamental plane channel flow and a plane impinging jet.

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