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Robin-Robin preconditioned Krylov methods for fluid-structure interaction problems

机译:Robin-Robin预处理Krylov方法解决流固耦合问题

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摘要

In this work, we propose a Robin-Robin preconditioner combined with Krylov iterations for the solution of the interface system arising in fluid-structure interaction (FSI) problems. It can be seen as a partitioned FSI procedure and in this respect it generalizes the ideas introduced in [S. Badia, F. Nobile, C. Vergara, J. Comput. Phys. 227 (2008) 7027-7051 ]. We analyze the convergence of GMRES iterations with the Robin-Robin preconditioner on a model problem and compare its efficiency with some existing algorithms. The method is shown to be very efficient for many challenging fluid-structure interaction problems, such as those characterized by a large added-mass effect or by enclosed fluids. In particular, the possibility to solve balloon-type problems without any special treatment makes this algorithm very appealing compared to the computationally intensive existing approaches.
机译:在这项工作中,我们提出了一种结合了Krylov迭代的Robin-Robin预处理器,用于解决流固耦合(FSI)问题中出现的界面系统。可以将其视为分区的FSI程序,在这方面,它可以概括[S.S.B.S.]中介绍的思想。 Badia,F.Nobile,C.Vergara,J.Comput。物理227(2008)7027-7051]。我们在模型问题上使用Robin-Robin预处理器分析了GMRES迭代的收敛性,并将其效率与一些现有算法进行了比较。对于许多挑战性的流体-结构相互作用问题,例如以大量附加质量效应或封闭流体为特征的问题,该方法显示出非常有效的效果。特别是,无需任何特殊处理即可解决气球型问题的可能性使该算法与计算密集型现有方法相比非常有吸引力。

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