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Sixth International Symposium on Turbulence and Shear Flow Phenomena
June, 22-24, 2009 , Seoul National University, Seoul, Korea

DOI: 10.1615/TSFP6

LES APPROACH COUPLED WITH STOCHASTIC FORCING OF SUBGRID ACCELERATION IN COMPUTATION OF A HIGH REYNOLDS NUMBER CHANNEL FLOW

pages 905-910
DOI: 10.1615/TSFP6.1450
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RÉSUMÉ

In this paper, the non-filtered velocity field in a well-developed turbulent channel flow is simulated in the framework of LES-SSAM (stochastic subgrid acceleration model), Sabelnikov et al. (2007). A new stochastic subgrid scale (SGS) model is proposed. This model introduces explicitly the cross-channel correlation of subgrid velocity gradients and includes two parameters: the Reynolds number based on the friction velocity, and the channel half-width. The objective is to assess the capability of this model in comparison to the standard large-eddy simulation (LES) and to direct numerical simulation (DNS).

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