Decomposition and parallelization of strongly coupled fluid-structure interaction linear subsystems based on the Q1/P0 discretization

摘要

Traditional fluid-structure interaction techniques are based on arbitrary Lagrangian-Eulerian method, where strong coupling method is used to solve fundamental discretized equations. After discretization, resulting nonlinear systems are solved using an iterative method leading to set of linear subsystems. The resulting linear subsystem matrices are sparse non-symmetric indefinite with small or zero diagonal entries. The small pivots of these matrices may render the incomplete LU factorization unstable or inaccurate. To improve that, this paper proposes an approach that can be used together with a stabilization and offers an additional feature to be used to gain an advantage in its parallelization. (C) 2016 Published by Elsevier Ltd.