ABGRALL, Rémi; BARSUKOW, Wasilij

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ABGRALL, Rémi
Universität Zürich [Zürich] = University of Zurich [UZH]

BARSUKOW, Wasilij
Institut de Mathématiques de Bordeaux [IMB]

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Active Flux is a recently developed numerical method for hyperbolic conservation laws. Its classical degrees of freedom are cell averages and point values at cell interfaces. These latter are shared between adjacent cells, leading to a globally continuous reconstruction. The update of the point values includes upwinding, but without solving a Riemann Problem. The update of the cell average requires a flux quadrature at the cell interface, which can be immediately performed using the point values. This paper explores different extensions of Active Flux to arbitrarily high order of accuracy, while maintaining the idea of global continuity. We propose to either increase the stencil while keeping the same degrees of freedom, or to increase the number of point values, or to include higher moments as new degrees of freedom. These extensions have different properties, and reflect different views upon the relation of Active Flux to the families of Finite Volume, Finite Difference and Finite Element methods.< Leer menos

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Active Flux

high order methods

conservation laws Mathematics Subject Classification (2010): 65M06

65M08

65M60

76N99

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Extensions of Active Flux to arbitrary order of accuracy

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