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A High-Order Method for Weakly Compressible Flows

Published online by Cambridge University Press:  28 July 2017

Klaus Kaiser*
Affiliation:
IGPM, RWTH Aachen University, Templergraben 55, 52062 Aachen, Germany
Jochen Schütz*
Affiliation:
Faculty of Sciences, Hasselt University, Agoralaan Gebouw D, BE-3590 Diepenbeek, Belgium
*
*Corresponding author. Email addresses:kaiser@igpm.rwth-aachen.de (K. Kaiser), jochen.schuetz@uhasselt.be (J. Schütz)
*Corresponding author. Email addresses:kaiser@igpm.rwth-aachen.de (K. Kaiser), jochen.schuetz@uhasselt.be (J. Schütz)

Abstract

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In this work, we introduce an IMEX discontinuous Galerkin solver for the weakly compressible isentropic Euler equations. The splitting needed for the IMEX temporal integration is based on the recently introduced reference solution splitting [32, 52], which makes use of the incompressible solution. We show that the overall method is asymptotic preserving. Numerical results show the performance of the algorithm which is stable under a convective CFL condition and does not show any order degradation.

Information

Type
Research Article
Copyright
Copyright © Global-Science Press 2017