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Comparison of Subgrid-scale Viscosity Models and Selective Filtering Strategy for Large-eddy Simulations

Type
Articles dans des revues avec comité de lecture
Author
AUBARD, Guillaume
134975 Laboratoire de Dynamique des Fluides [DynFluid]
STEFANIN VOLPIANI, Pedro
134975 Laboratoire de Dynamique des Fluides [DynFluid]
GLOERFELT, Xavier
134975 Laboratoire de Dynamique des Fluides [DynFluid]
ROBINET, Jean-Christophe
134975 Laboratoire de Dynamique des Fluides [DynFluid]

URI
http://hdl.handle.net/10985/8637
DOI
10.1007/s10494-013-9485-5
Date
2013
Journal
Flow, Turbulence and Combustion

Abstract

Explicitly filtered large-eddy simulations (LES), combining high-accuracy schemes with the use of a selective filtering without adding an explicit subgrid-scales (SGS) model, are carried out for the Taylor-Green-vortex and the supersonic-boundary-layer cases. First, the present approach is validated against direct numerical simulation (DNS) results. Subsequently, several SGS models are implemented in order to investigate if they can improve the initial filter-based methodology. It is shown that the most accurate results are obtained when the filtering is used alone as an implicit model, and for a minimal cost. Moreover, the tests for the Taylor-Green vortex indicate that the discretization error from the numerical methods, notably the dissipation error from the high-order filtering, can have a greater influence than the SGS models.

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