A Nitsche-based formulation for fluid-structure interactions with contact
A Nitsche-based formulation for fluid-structure interactions with contact
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基于 Nitche 的接触流固耦合公式
DOI:
10.1051/m2an/2019072
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发表时间:
2019
期刊:
影响因子:
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通讯作者:
Stefan Frei
中科院分区:
文献类型:
--
作者:
Erik Burman;Miguel A Fernández;Stefan Frei
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 J. Numer. Anal.51(2013) 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 Γ(t). 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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DOI:
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发表时间:
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影响因子:
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DOI:
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期刊:
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