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STABILIZED, MULTISCALE, AND MULTIPHYSICS METHODS IN FLUID MECHANICS

Vector Extrapolation for Strong Coupling Fluid-Structure Interaction Solvers

[+] Author and Article Information
Ulrich Küttler, Wolfgang A. Wall

Chair of Computational Mechanics, TU München, Boltzmannstrasse 15, 85747 Garching, Germany

J. Appl. Mech 76(2), 021205 (Jan 15, 2009) (7 pages) doi:10.1115/1.3057468 History: Received November 20, 2007; Revised May 02, 2008; Published January 15, 2009

Fluid-structure interaction (FSI) solvers based on vector extrapolation methods are discussed. The FSI solver framework builds on a Dirichlet–Neumann partitioning between general purpose fluid and structural solver. For strong coupling of the two fields vector extrapolation methods are employed to obtain a matrix free nonlinear solver. The emphasis of this presentation is on the embedding of well known vector extrapolation methods in a popular FSI solver framework and, in particular, the relation of these vector extrapolation methods to established fixed-point FSI schemes.

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Copyright © 2009 by American Society of Mechanical Engineers
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Figures

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Figure 1

Driven cavity with flexible bottom

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Figure 5

Number of FSI cycles for driven cavity with structural density ρS=5 kg/m3 and kmax=10

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Figure 6

Number of FSI cycles for driven cavity with structural density ρS=500 kg/m3 and kmax=2

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Figure 7

Number of FSI cycles for driven cavity with structural density ρS=50 kg/m3 and kmax=2

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Figure 8

Number of FSI cycles for driven cavity with structural density ρS=5 kg/m3 and kmax=2

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Figure 2

Driven cavity velocity and pressure solution at t=7.5 s

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Figure 3

Number of FSI cycles for driven cavity with structural density ρS=500 kg/m3 and kmax=10

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Figure 4

Number of FSI cycles for driven cavity with structural density ρS=50 kg/m3 and kmax=10

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