Stability of a coupling technique for partitioned solvers in FSI applications

Joris Degroote; Peter Bruggeman; Robby Haelterman; Jan Vierendeels

doi:10.1016/j.compstruc.2008.05.005

Stability of a coupling technique for partitioned solvers in FSI applications

Joris Degroote, Peter Bruggeman, Robby Haelterman, Jan Vierendeels

Hyperspectral Unit

University of Ghent

Publikation: Beitrag in Fachzeitschrift › Artikel › Begutachtung

Abstract

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.

Originalsprache	Englisch
Seiten (von - bis)	2224-2234
Seitenumfang	11
Fachzeitschrift	Computers and Structures
Jahrgang	86
Ausgabenummer	23-24
DOIs	https://doi.org/10.1016/j.compstruc.2008.05.005
Publikationsstatus	Veröffentlicht - Dez. 2008

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10.1016/j.compstruc.2008.05.005

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title = "Stability of a coupling technique for partitioned solvers in FSI applications",

abstract = "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.",

keywords = "Artery, Black box, Elastic tube, Fluid-structure interaction, Fourier error analysis, Reduced-order model",

author = "Joris Degroote and Peter Bruggeman and Robby Haelterman and Jan Vierendeels",

note = "Funding Information: The authors gratefully acknowledge the funding of Joris Degroote and Peter Bruggeman by a Ph.D. fellowship of the Research Foundation – Flanders (FWO). Joris Degroote acknowledges a grant for a long stay abroad at the Massachusetts Institute of Technology (MIT) of the Research Foundation – Flanders. Jan Vierendeels acknowledges the funding by Research Project G027508 of the Research Foundation – Flanders (FWO). ",

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doi = "10.1016/j.compstruc.2008.05.005",

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N1 - Funding Information: The authors gratefully acknowledge the funding of Joris Degroote and Peter Bruggeman by a Ph.D. fellowship of the Research Foundation – Flanders (FWO). Joris Degroote acknowledges a grant for a long stay abroad at the Massachusetts Institute of Technology (MIT) of the Research Foundation – Flanders. Jan Vierendeels acknowledges the funding by Research Project G027508 of the Research Foundation – Flanders (FWO).

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N2 - 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.

AB - 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.

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Stability of a coupling technique for partitioned solvers in FSI applications

Abstract

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