Adaptive Mesh Refinement With An Automatic Hybrid Rans/Les Strategy And Overset Grids

A simulation strategy combining an octree-AMR and an HRL turbulence model with overset grids is investigated in FLUSEPA (TM), the Finite-Volume solver developed by ArianeGroup. The turbulence model used is a k - epsilon with a Delayed Detached Eddy Simulation [14] treatment for the destruction term of k. First, we study the influence of the refinement criteria on the pressure fluctuations in the recirculation area of a cylindrical backward facing step. Using an initially coarse grid, we compare the results with those from a fixed fine grid calculation. Then, the methodology is applied to the numerical simulation of the buffeting of an Ariane 5 model.