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A Nitsche-based formulation for fluid-structure interactions with contact

Erik Burman 1 Miguel Angel Fernández 2 Stefan Frei 1
2 REO - Numerical simulation of biological flows
LJLL - Laboratoire Jacques-Louis Lions, UPMC - Université Pierre et Marie Curie - Paris 6, Inria de Paris
Abstract : We derive a Nitsche-based formulation for fluid-structure interaction (FSI) problems with contact. The approach is based on the work of Chouly and Hild [SIAM Journal on Numerical Analysis. 2013;51(2):1295–1307] for contact problems in solid mechanics. We present two numerical approaches, both of them formulating the FSI interface and the contact conditions simultaneously in equation form on a joint interface-contact surface. The first approach uses a relaxation of the contact conditions to allow for a small mesh-dependent gap between solid and wall. The second alternative introduces an artificial fluid below the contact surface. The resulting systems of equations can be included in a consistent fashion within a monolithic variational formulation, which prevents the so-called “chattering” phenomenon. To deal with the topology changes in the fluid domain at the time of impact, we use a fully Eulerian approach for the FSI problem. We compare the effect of slip and no-slip interface conditions and study the performance of the method by means of numerical examples.
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Submitted on : Thursday, May 3, 2018 - 6:34:40 PM
Last modification on : Thursday, March 26, 2020 - 9:27:06 PM
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  • HAL Id : hal-01784841, version 1



Erik Burman, Miguel Angel Fernández, Stefan Frei. A Nitsche-based formulation for fluid-structure interactions with contact. [Research Report] RR-9172, Inria. 2018. ⟨hal-01784841v1⟩



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