From CAD to Adapted Solution for Error Controlled CFD Simulations

Abstract : The aim of this paper is to present an integrated environment (FINE/Hexa (TM), HEXPRESS (TM)) for the error controlled simulation of industrial flows in complex geometries. The approach uses hexahedral unstructured meshes to ensure accurate solutions and mesh adaptation to optimize mesh resources. Initial hexahedral coarse meshes are automatically generated for complex domains with minor CAD model manipulation thanks to a volume to surface mesh generation approach. A multigrid method tightly coupled with the mesh adaptation history allows the fast resolution of the non-linear discrete flow problem resulting from a second-order cell-centered approximation.