Towards industrial use of anisotropic hexahedral mesh adaptation for hydrodynamic flows
Résumé
This paper discusses the preparation of the flow solver ISIS-CFD for industrial simulation of free-surface hydrodynamic flows with adaptive mesh refinement. To accurately capture the free surface and boundary layers, anisotropic hexahedral mesh refinement and derefinement is performed by local cell division. The adaptation is based on metric criteria which combine Hessians of the flow variables and free-surface detection. Analytical mesh deformation is used to account for body movement, while a dedicated local deformation algorithm handles the projection of the adapted mesh onto the geometry. It is shown that computational setup protocols can be defined to choose the simulation parameters, without user intervention, for large classes of simulations. Tests on different ships and lifting hydrofoils show the efficiency and versatility of the method.
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