Conference Agenda
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Daily Overview |
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RAU3: Recent Advances in Unfitted Finite Element Methods Location: A703 Session Chair: Christian Engwer | |
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Numerical Simulations of Fully Eulerian Fluid-Structure Contact Interaction Using a Ghost-Penalty Cut Finite Element Approach 1: Leibniz Universität Hannover, Germany; 2: University of Konstanz, Germany This talk is about the application of an approach to solve nonlinear, nonstationary fluid-structure interaction (FSI) problems using a fully Eulerian framework based on the cut finite element method (CutFEM). It includes the handling of moving interfaces and contact. The approach maintains fluid dynamics in Eulerian coordinates while transforming the solid mechanics seamlessly into the same framework, allowing for a monolithic solution on a fixed mesh. In the discrete weak formulation ghost penalty terms ensure stability and allow to deal with the moving interface. The contact handling is addressed with a relaxed contact condition, integrated through a Nitsche method, which efficiently manages the transition from FSI to contact conditions. This method is demonstrated through the simulation of a state-of-the-art benchmark scenario involving an elastic ball interacting with a boundary. Our findings contribute to essential insights into contact times, impact velocities, and energy dynamics while showcasing the capability of the method in handling complex FSI scenarios with topology changes. | |
