A damping preconditioner for time-harmonic wave equations in fluid and elastic material

JOURNAL OF COMPUTATIONAL PHYSICS

卷:228

Article

Airaksinen, Tuomas¹  Pennanen, Anssi¹  Toivanen, Jari² 

[1] Univ Jyvaskyla, Dept Math Informat Technol, FI-40014 Agora, Finland

[2] Stanford Univ, Inst Computat & Math Engn, Stanford, CA 94305 USA

关键词: Helmholtz equation;    Navier equation;    Algebraic multigrid method;    GMRES;    Preconditioning;    Finite element method;   

DOI  :  10.1016/j.jcp.2008.10.036

来源: Elsevier

【 摘 要 】

A physical damping is considered as a preconditioning technique for acoustic and elastic wave scattering. The earlier preconditioners for the Helmholtz equation are generalized for elastic materials and three-dimensional domains. An algebraic multigrid method is used in approximating the inverse of damped operators. Several numerical experiments demonstrate the behavior of the method in complicated two-dimensional and three-dimensional domains. (c) 2008 Elsevier Inc. All rights reserved.

【 授权许可】

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