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arXiv 1205.6887math.NAcs.NA
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血液动力学中流固耦合问题的运动耦合β格式的稳定性

Stability of the kinematically coupled β-scheme for fluid-structure interaction problems in hemodynamics

University of Houston(休斯顿大学)

Suncica Canic, Boris Muha, Martina Bukac

AI总结:

针对血液动力学中流固耦合问题,本文证明运动耦合β格式对所有β∈[0,1]无附加质量效应且无条件稳定,并通过数值实验验证。

摘要:

众所周知,对于流固耦合问题,经典的Dirichlet-Neumann松散耦合分区格式在血液动力学中某些物理和几何参数组合下是无条件不稳定的。文献\cite{causin2005added}通过一个简单测试问题表明,这些不稳定性与所谓的“附加质量效应”有关。本文考虑与\cite{causin2005added}相同的测试问题,证明最近在\cite{MarSun}中引入的一种新颖的分区松散耦合格式——运动耦合β格式,对于任意β∈[0,1]都不受附加质量效应影响,并且对于问题中的所有参数都是无条件稳定的。针对首次在\cite{formaggia2001coupling}中考虑的全非线性耦合基准FSI问题,给出了显示无条件稳定性的数值结果。

英文摘要:

It is well-known that classical Dirichlet-Neumann loosely coupled partitioned schemes for fluid-structure interaction (FSI) problems are unconditionally unstable for certain combinations of physical and geometric parameters that are relevant in hemodynamics. It was shown in \cite{causin2005added} on a simple test problem, that these instabilities are associated with the so called ``added-mass effect''. By considering the same test problem as in \cite{causin2005added}, the present work shows that a novel, partitioned, loosely coupled scheme, recently introduced in \cite{MarSun}, called the kinematically coupled $β$-scheme, does not suffer from the added mass effect for any $β\in [0,1]$, and is unconditionally stable for all the parameters in the problem. Numerical results showing unconditional stability are presented for a full, nonlinearly coupled benchmark FSI problem, first considered in \cite{formaggia2001coupling}.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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