バックグラウンドメッシュに基づくメッシュ再構築手法を用いた自由表面を有する流体-構造連成問題のためのALE有限要素法

抄録

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.