A mixed multiscale model accounting for the cross term of the sub-grid scale stress

Thiry, Olivier;Winckelmans, Grégoire
(2014) 11th World Congress on Computational Mechanics, 5th European Conference on Computational Mechanics, 6th European Conference on Computational Fluid Dynamics — Location: Barcelone (20.July.2014)

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Purely dissipative eddy-viscosity subgrid-scales (SGS) stress models are broadly used in large eddy simulations (LES) of turbulent flows. The actual SGS behavior is however locally not purely dissipative. In this sense, more advanced models are desirable. Such a model is presented hereafter and is tested in decaying homogeneous isotropic turbulence (HIT). We propose a dynamic mixed model that accounts for both the Reynolds term and the cross-term of the SGS stress tensor. The model is shown to behave in good agreement with the reference DNS.
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Thiry, O., & Winckelmans, G. (2014). A mixed multiscale model accounting for the cross term of the sub-grid scale stress. 11th World Congress on Computational Mechanics, 5th European Conference on Computational Mechanics, 6th European Conference on Computational Fluid Dynamics, Barcelone. https://hdl.handle.net/2078.5/223584