Channel flow LES with stochastic modeling of the subgrid acceleration

Mikhael Gorokhovski (1) , Rémi Zamansky (1) , Ivana Vinkovic (1)

1 LMFA - Laboratoire de Mecanique des Fluides et d'Acoustique

In this paper, the non-filtered velocity field in a well-developed turbulent channel flow is simulated in the framework of LES-SSAM (stochastic subgrid acceleration model) approach. A novel stochastic SGS model is proposed. This model introduces explicitly the cross-channel correlation of subgrid velocity gradients and includes two parameters: the Reynolds number based on the friction velocity, and the channel half-width. The objective was to assess the capability of this model in comparison to the standard LES and to direct numerical simulation (DNS).

Domaines: Mécanique des fluides [physics.class-ph]; Mécanique des fluides [physics.class-ph]

Mikhael Gorokhovski, Rémi Zamansky, Ivana Vinkovic. Channel flow LES with stochastic modeling of the subgrid acceleration. Studying Turbulence Using Numerical Simulation Databases - XII, Jul 2011, Stanford, United States. pp.377-386. ⟨hal-00683116⟩