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.

Central Runge - Kutta schemes for conservation laws / L., Pareschi; Puppo, Gabriella; G., Russo. - In: SIAM JOURNAL ON SCIENTIFIC COMPUTING. - ISSN 1064-8275. - 26:(2005), pp. 979-999.

Central Runge - Kutta schemes for conservation laws

PUPPO, GABRIELLA;
2005

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.
2005
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11583/1404238
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