Semi-Implicit Roe-Type Fluxes for Low-Mach Number Flows

Jean-Frédéric Gerbeau 1 Nathalie Glinsky-Olivier Bernard Larrouturou
1 CAIMAN - Scientific computing, modeling and numerical analysis
CRISAM - Inria Sophia Antipolis - Méditerranée , ENPC - École des Ponts ParisTech, CNRS - Centre National de la Recherche Scientifique : UMR6621
Abstract : Two semi-implicit methods based on the splitting of the Euler equations flux into fluid and acoustic parts applied to low Mach number flows are presented. The first method is based on the splitting of slow and fast eigenvalues of the jacobian matrix of the fluxes and a semi-implicit scheme is constructed by introducing only the fast eigenvalues in the implicit matrices. The second method is based on the splitting of the Euler flux by separating the terms in velocity and the terms in pressure ; this system is solved by a fractional step method. A semi-implicit scheme is obtained by using a linearised implicit scheme for the acoustic step only. These two methods are applied to the convection of a density pulse for Mach numbers equal to 0.1 and 0.01. Accuracy and efficiency of the different schemes are compared.
Type de document :
Rapport
RR-3132, INRIA. 1997
Liste complète des métadonnées

https://hal.inria.fr/inria-00073557
Contributeur : Rapport de Recherche Inria <>
Soumis le : mercredi 24 mai 2006 - 13:11:16
Dernière modification le : jeudi 11 janvier 2018 - 16:21:52
Document(s) archivé(s) le : dimanche 4 avril 2010 - 23:50:18

Fichiers

Identifiants

  • HAL Id : inria-00073557, version 1

Citation

Jean-Frédéric Gerbeau, Nathalie Glinsky-Olivier, Bernard Larrouturou. Semi-Implicit Roe-Type Fluxes for Low-Mach Number Flows. RR-3132, INRIA. 1997. 〈inria-00073557〉

Partager

Métriques

Consultations de la notice

299

Téléchargements de fichiers

136