Towards practical large-eddy simulations of complex turbulent flows

Abstract : A Shear-Improved Smagorinsky model (SISM) allowing to address non-homogeneous and unsteady flow configurations in a physically-sound manner, without adding significant complication and computation compared to the standard Smagorinsky model, is studied and implemented. Interestingly, the SISM does not call for any adjustable parameter nor ad-hoc damping function. It makes use here of an exponential smoothing algorithm to estimate the ensemble-average of the strain from the temporal evolution of the flow. Application on a flow past a circular cylinder is used as a test of the method.
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https://hal-ens-lyon.archives-ouvertes.fr/ensl-00420589
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Submitted on : Tuesday, September 29, 2009 - 1:48:11 PM
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Jérôme Boudet, Adrien Cahuzac, Pierre Borgnat, Emmanuel Lévêque, Federico Toschi. Towards practical large-eddy simulations of complex turbulent flows. 12th EUROMECH European Turbulence Conference, Sep 2009, Marburg, Germany. ⟨ensl-00420589⟩

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