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

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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Document type	Communication à un colloque (Conference Paper) – Présentation orale avec comité de sélection
Access type	Accès libre
Publication date	2014
Language	Anglais
Conference	"11th World Congress on Computational Mechanics, 5th European Conference on Computational Mechanics, 6th European Conference on Computational Fluid Dynamics", Barcelone (du 20/07/2014 au 25/07/2014)
Peer reviewed	yes
Affiliation	UCL - SST/IMMC/TFL - Thermodynamics and fluid mechanics
Keywords	homogeneous isotropic turbulence ; turbulent flow ; subgrid scales ; modeling ; multiscale ; mixed ; cross term ; SGS ; dynamic
Links	http://hdl.handle.net/2078.1/140182[Handle]

See also
	[boreal:140016]	A Mixed Multiscale Dynamic Sgs Model Accounting For The Cross-term