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.
https://hal-ens-lyon.archives-ouvertes.fr/ensl-00420589
Contributor : Pierre Borgnat
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Submitted on : Tuesday, September 29, 2009 - 1:48:11 PM
Last modification on : Wednesday, November 20, 2019 - 2:53:25 AM
Long-term archiving on : Tuesday, October 16, 2012 - 11:35:17 AM
