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Abstract
This paper presents an ALE (Arbitrary Lagrangian-Eulerian) finite element methodfor fluidstructure interaction (FSI) problems with free surface. The mesh re-generation method based on background mesh is introduced to improve the applicability to the complicated FSI problems. The incompressible Navier-Stokes equation based on ALE description is used as the governing equation of fluid. The SUPG/PSPG formulation is employed for the finite element discretization. The structure is assumed to be a rigid body. As numerical examples, the present method is applied to the floating problem of a circular object, the water entry problem ofa wedge object and the falling problem of a circular object. The efficiency of the present method is shown by numerical results.
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