Variational Multiscale LES and Hybrid RANS/LES Simulation of Complex Unsteady Flow
Hilde Ouvrard (Département de Mathématiques, Université Montpellier II)Bruno Koobus (Département de Mathématiques, Université Montpellier II)
Maria-Vittoria Salvetti (Dipartimento di Ingenioria Aerospaziale, Università di Pisa)
Simone Camarri (Dipartimento di Ingenioria Aerospaziale, Università di Pisa)
Alain Dervieux (INRIA, Sophia-Antipolis)
Abstract:
We study a new hybrid RANS/Variational Multiscale LES (VMS-LES) model for bluff body flows. The simulations have been carried out using a parallelized solver, based on a mixed element/volume formulation on unstructured grids. First, the behavior of a VMS-LES model with different subgrid scale models is investigated for the flow past a circular cylinder at Reynolds number Re=3900. Second, a new strategy for blending RANS and LES methods in a hybrid model is described and applied to the simulation of the flow around a circular cylinder at Re= 140000.
Keywords:
Multiscale and Multiphysics Problems, Computing for Aerospace and Engineering
