Hybrid simulation of high-Reynolds number flows relying on a variational multiscale model

Emmanuelle Itam (1) , Stephen Wornom (2) , Bruno Koobus (1) , Alain Dervieux (2)

1 I3M - Institut de Mathématiques et de Modélisation de Montpellier
2 Ecuador - Transformations et outils informatiques pour le calcul scientifique

We are interested in the study and improvement of the LES component in hybrid RANS-LES formulations. These models are not designed for blunt-body flows with laminar boundary layers, but it is interesting to examine how they behave in that case. A DDES model is compared with a dynamic Variational multi-scale (DVMS) LES model for two subcritical flows past a cylinder. We then propose a hybridation restricting to DVMS in LES regions. The performances of the different options are compared for subcritical flows and for a flow around a tandem cylinder.

Domaines: Autre [cs.OH]; Sciences de l'ingénieur [physics]

Emmanuelle Itam, Stephen Wornom, Bruno Koobus, Alain Dervieux. Hybrid simulation of high-Reynolds number flows relying on a variational multiscale model. 6th Symposium on Hybrid RANS-LES Methods , Sep 2016, Strasbourg, France. ⟨hal-01413453⟩