A mechanically consistent model for fluid-structure interactions with contact including seepage
A mechanically consistent model for fluid-structure interactions with contact including seepage
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DOI：
10.1016/j.cma.2022.114637
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发表时间：
2022-02-17
影响因子：
7.2
通讯作者：
Gerosa, Fannie M.
中科院分区：
文献类型：
--
作者：
Burman, Erik;Fernandez, Miguel A.;Gerosa, Fannie M.
提出了一种新的方法，机械一致的建模和仿真的流体-结构相互作用（FSI）的接触。其基本思想是将接触条件的放松与接触过程中通过共维多孔层的渗流建模相结合。对于后者，达西模型被认为是在一个薄的多孔层附着在固体边界的无限小厚度的限制。由此产生的计算模型是机械一致的，易于实现。通过统一的Nitsche方法，对流固耦合和接触条件进行了较弱的处理。我们分析的方法在详细的数值研究与厚壁和薄壁固体，在一个完全欧拉和沉浸的方法，并使用拟合和未拟合的有限元离散。(c)2022 Elsevier B. V.保留所有权利。
We present a new approach for the mechanically consistent modelling and simulation of fluid-structure interactions (FSI) with contact. The fundamental idea consists of combining a relaxation of the contact conditions with the modelling of seepage through a porous layer of co-dimension one during contact. For the latter, a Darcy model is considered in a thin porous layer attached to a solid boundary in the limit of infinitesimal thickness. The resulting computational model is both mechanically consistent and simple to implement. The FSI coupling and the contact conditions are imposed weakly by means of a unified Nitsche approach. We analyse the approach in detailed numerical studies with both thick-and thin-walled solids, within a fully Eulerian and an immersed approach and using fitted and unfitted finite element discretisations.(c) 2022 Elsevier B.V. All rights reserved.