2-D FLUID-STRUCTURE INTERACTION PROBLEMS BY AN ARBITRARY LAGRANGIAN-EULERIAN FINITE-ELEMENT METHOD

This paper presents a finite element analysis of a fluid-structure int eraction problem by the Arbitrary Lagrangian-Eulerian (ALE) method. Fo r the analysis of the Navier-Stokes equation, a fractional step method is used based the linear interpolation functions for both velocity an d pressure. For a numerical example, the present method is applied to the flow analysis around an oscillating rectangular cylinder. The tota l calculation domain is divided into several sub-domains to improve th e computational efficiency. In the inner domain, the mesh moves based on the ALE description. The outmost domain is the Eulerian domain. The intermediate domain is located as a transition.