Variational-Monolithic ALE Fluid-Structure Interaction: Comparison of Computational Cost and Mesh Regularity Using Different Mesh Motion Techniques

Abstract

In this contribution, different mesh motion models for fluid-structure inter-action (FSI) are revisited. The FSI problem is formulated by variational-monolithic coupling in the reference configuration employing the arbitrary-Lagrangian Eule-rian (ALE) framework. The goal is to further analyze three different mesh motion models; namely nonlinear harmonic, nonlinear elastic, and linear biharmonic. The novelty in this contribution is a detailed computational analysis of the regularity of the ALE mapping and cost complexity for the nonstationary FSI-2 benchmark problem with large solid deformations.