Abstract
This paper deals with numerical simulations involving three-dimensional moving geometries with large displacements. Such simulations are much valued by industries, but remain very time-consuming. A robust moving mesh algorithm coupling an elasticity-like mesh deformation solution and mesh optimizations is proposed, that allows to avoid remeshing while performing large displacements. However, this is done at the cost of relaxing the fixed-topology constraint imposed by the classical Arbitrary-Lagrangian-Eulerian (ALE) framework. An ALE compressible flow solver is integrated to this process. This solver lies on the strict interpretation of the Discrete Geometrical Conservation Law to preserve the order of accuracy of the time integration. For fluid-structure interaction (FSI) simulations, the six degrees of freedom (6-DOF) approach for rigid bodies is considered. Finally, 3D imposed-motion and FSI examples are given, to validate the proposed approach
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