An Algorithm for the Strong-Coupling of the Fluid-Structure Interaction Using a Staggered Approach

Abstract EN

We present a staggered approach for the solution of the piston fluid-structure problem in a time-dependent domain.

The one-dimensional fluid flow is modelled using the nonlinear Euler equations.

We investigate the time marching fluid-structure interaction and integrate the fluid and structure equations alternately using separate solvers.

The Euler equations are written in moving mesh coordinates using the arbitrary Lagrangian-Eulerian (ALE) approach and discretised in space using the finite element method while the structure is integrated in time using an implicit finite difference Newmark-Wilson scheme.

The influence of the time lag is studied by comparing two different structural predictors.