Stability of a coupling technique for partitioned solvers in FSI applications

被引：119

作者：

Degroote, Joris ^{[1
]}

Bruggeman, Peter ^{[2
]}

Haelterman, Robby ^{[3
]}

Vierendeels, Jan ^{[1
]}

机构：

[1] Univ Ghent, Dept Flow Heat & Combust Mech, B-9000 Ghent, Belgium

[2] Univ Ghent, Dept Appl Phys, B-9000 Ghent, Belgium

[3] Royal Mil Acad, Dept Math MWMW, B-1000 Brussels, Belgium

来源：

COMPUTERS & STRUCTURES | 2008年 / 86卷 / 23-24期

基金：

比利时弗兰德研究基金会;

关键词：

Elastic tube; Artery; Fluid-structure interaction; Fourier error analysis; Reduced-order model; Black box;

D O I：

10.1016/j.compstruc.2008.05.005

中图分类号：

TP39 [计算机的应用];

学科分类号：

081203 ; 0835 ;

摘要：

This paper focuses on the stability of the coupling iterations in the partitioned approach to fluid-structure interaction. Previous research has shown that the number of coupling iterations increases when the time step decreases or when the structure becomes more flexible which is explained here by Fourier error analysis of the unsteady, incompressible flow in an elastic tube. Substituting a linearized model of the structural solver into the flow solver makes the coupling more stable but is impracticable if the flow solver is a black box. Therefore the coupling iterations are stabilized by coupling with reduced-order models and Aitken underrelaxation. (C) 2008 Elsevier Ltd. All rights reserved.

引用

页码：2224 / 2234

页数：11

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