TAMING THE CFL NUMBER FOR DISCONTINUOUS GALERKIN METHODS ON STRUCTURED MESHES
In: SIAM journal on numerical analysis, Jg. 46 (2009), Heft 6, S. 3151-3180
Online
academicJournal
- print, 33 ref
Zugriff:
The upwind discontinuous Galerkin method is an attractive method for solving time-dependent hyperbolic conservation laws. It is possible to use high-order explicit time-stepping methods and high-order spatial approximations without incurring heavy numerical linear algebra overheads. However, the Courant-Friedrichs-Lewy (CFL) condition for these methods depends on the polynomial order used, and there is a somewhat excessive cost for using very high order spatial approximation. We discuss the impact of a covolume mesh based filter on the CFL number for these methods and present an algorithm which has a CFL number independent of the spatial order of approximation. We present computational results for the advection equation and the wave equation on one-dimensional meshes using up to tenth order in space and time.
Titel: |
TAMING THE CFL NUMBER FOR DISCONTINUOUS GALERKIN METHODS ON STRUCTURED MESHES
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Autor/in / Beteiligte Person: | WARBURTON, T ; HAGSTROM, T |
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Zeitschrift: | SIAM journal on numerical analysis, Jg. 46 (2009), Heft 6, S. 3151-3180 |
Veröffentlichung: | Philadelphia, PA: Society for Industrial and Applied Mathematics, 2009 |
Medientyp: | academicJournal |
Umfang: | print, 33 ref |
ISSN: | 0036-1429 (print) |
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