Preprint 2004-064

Central Runge-Kutta Schemes for Hyperbolic Conservation Laws

Lorenzo Pareschi, Gabriella Puppo and Giovanni Russo

Abstract: In this work, a new formulation for central schemes based on staggered grids is proposed. It is based on a novel approach, in which first a time discretization is carried out, followed by the space discretization. The schemes obtained in this fashion have a simpler structure than previous central schemes. For high order schemes, this simplification results in higher computational efficiency. In this work, schemes of order 2 to 5 are proposed and tested, although CRK schemes of any order of accuracy can be constructed in principle. The application to systems of equations is carefully studied, comparing algorithms based on a componentwise extension of the scalar scheme, and algorithms based on projection along characteristic directions.

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Lorenzo Pareschi, <>
Gabriella Puppo, <>
Giovanni Russo, <>
Publishing information:
To appear in SIAM J. Sci. Comp.
Submitted by:
<> November 25 2004.

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