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Low‐cost implicit schemes for all‐speed flows on unstructured meshes
Author(s) -
Kloczko T.,
Corre C.,
Beccantini A.
Publication year - 2008
Publication title -
international journal for numerical methods in fluids
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.938
H-Index - 112
eISSN - 1097-0363
pISSN - 0271-2091
DOI - 10.1002/fld.1730
Subject(s) - preconditioner , mach number , polygon mesh , computer science , exploit , computational fluid dynamics , compressible flow , mathematical optimization , flow (mathematics) , matrix (chemical analysis) , mathematics , compressibility , computational science , algorithm , iterative method , aerospace engineering , engineering , geometry , materials science , computer graphics (images) , computer security , composite material
Matrix‐free implicit treatments are now commonly used for computing compressible flow problems: a reduced cost per iteration and low‐memory requirements are their most attractive features. This paper explains how it is possible to preserve these features for all‐speed flows, in spite of the use of a low‐Mach preconditioning matrix. The proposed approach exploits a particular property of a widely used low‐Mach preconditioner proposed by Turkel. Its efficiency is demonstrated on some steady and unsteady applications. Copyright © 2008 John Wiley & Sons, Ltd.