We present a new composite mesh finite element method for fluid--structure interaction problems. The method is based on surrounding the structure by a boundary-fitted fluid mesh which is embedded into a fixed background fluid mesh. The embedding allows for an arbitrary overlap of the fluid meshes. The coupling between the embedded and background fluid meshes is enforced using a stabilized Nitsche formulation which allows us to establish stability and optimal order \emph{a priori} error estimates, see~\cite{MassingLarsonLoggEtAl2013}. We consider here a steady state fluid--structure interaction problem where a hyperelastic structure interacts with a viscous fluid modeled by the Stokes equations. We evaluate an iterative solution procedure based on splitting and present three-dimensional numerical examples.
@article{arxiv.1311.2431,
title = {A Nitsche-based cut finite element method for a fluid--structure interaction problem},
author = {Andre Massing and Mats G. Larson and Anders Logg and Marie E. Rognes},
journal= {arXiv preprint arXiv:1311.2431},
year = {2016}
}
Comments
Revised version, 18 pages, 7 figures. Accepted for publication in CAMCoS