Using singular values to build a subgrid-scale model for large eddy simulations - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Physics of Fluids Année : 2011

Using singular values to build a subgrid-scale model for large eddy simulations

Résumé

An eddy-viscosity based, subgrid-scale model for large eddy simulations is derived from the analysis of the singular values of the resolved velocity gradient tensor. The proposed sigma-model has, by construction, the property to automatically vanish as soon as the resolved field is either two-dimensional or two-component, including the pure shear and solid rotation cases. In addition, the model generates no subgrid-scale viscosity when the resolved scales are in pure axisymmetric or isotropic contraction/expansion. At last, it is shown analytically that it has the appropriate cubic behavior in the vicinity of solid boundaries without requiring any ad-hoc treatment. Results for two classical test cases (decaying isotropic turbulence and periodic channel flow) obtained from three different solvers with a variety of numerics (finite elements, finite differences, or spectral methods) are presented to illustrate the potential of this model. The results obtained with the proposed model are systematically equivalent or slightly better than the results from the Dynamic Smagorinsky model. Still, the sigma-model has a low computational cost, is easy to implement, and does not require any homogeneous direction in space or time. It is thus anticipated that it has a high potential for the computation of non-homogeneous, wall-bounded flows.
Fichier principal
Vignette du fichier
paper.pdf (261.52 Ko) Télécharger le fichier
Origine : Fichiers produits par l'(les) auteur(s)
Loading...

Dates et versions

hal-00802472 , version 1 (19-03-2013)

Identifiants

Citer

Franck Nicoud, Hubert Baya Toda, Olivier Cabrit, Sanjeeb Bose, Jungil Lee. Using singular values to build a subgrid-scale model for large eddy simulations. Physics of Fluids, 2011, 23 (8), pp.085106. ⟨10.1063/1.3623274⟩. ⟨hal-00802472⟩
607 Consultations
1504 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More