Issue |
ESAIM: ProcS
Volume 55, December 2016
CEMRACS 2015: Coupling multi-physics models involving fluids
|
|
---|---|---|
Page(s) | 61 - 82 | |
DOI | https://doi.org/10.1051/proc/201655061 | |
Published online | 15 February 2017 |
Study of Physics-Based preconditioning with High-order Galerkin discretization for hyperbolic wave problems
1
LMO, Université Paris Sud, Orsay, France
2
INRIA Nancy Grand-Est and IRMA Strasbourg, TONUS Team, France
3
Max-Planck-Institut für Plasmaphysik, Boltzmannstraß e 2D-85748 Garching, Germany
In this article, we detail the construction of a physics-based preconditioner. The Schur decomposition is the key point of the method which is tested on two hyperbolic systems : acoustic wave equations and shallow water equations without source term. Some conserved properties between preconditoner and initial operator are discussed, especially the propagation speeds of a plane wave.
Résumé
Dans cet article, nous détaillons la construction d’un préconditioneur basé sur la physique sous-jacente des équations considérées. La décomposition de Schur est le point clé de la méthode, qui sera testée sur deux systèmes hyperboliques : les équations des ondes acoustiques et les équations de Saint Venant sans terme source. Nous étudions certaines propriétés conservées entre le préconditioneur et l’opérateur initial, notamment les vitesses de propagation d’une onde plane.
© EDP Sciences, SMAI 2017
This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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