On the connection between some Riemann-solver free approaches to the approximation of multi-dimensional systems of hyperbolic conservation laws
RWTH Aachen, Institut für Geometrie und Praktische
Mathematik, Templergraben 55, 52056 Aachen, Germany. email@example.com.; firstname.lastname@example.org.
2 ETH Zentrum, Seminar für Angewandte Mathematik, 8092 Zürich, Switzerland.
Revised: 1 September 2004
In this paper, we present some interesting connections between a number of Riemann-solver free approaches to the numerical solution of multi-dimensional systems of conservation laws. As a main part, we present a new and elementary derivation of Fey's Method of Transport (MoT) (respectively the second author's ICE version of the scheme) and the state decompositions which form the basis of it. The only tools that we use are quadrature rules applied to the moment integral used in the gas kinetic derivation of the Euler equations from the Boltzmann equation, to the integration in time along characteristics and to space integrals occurring in the finite volume formulation. Thus, we establish a connection between the MoT approach and the kinetic approach. Furthermore, Ostkamp's equivalence result between her evolution Galerkin scheme and the method of transport is lifted up from the level of discretizations to the level of exact evolution operators, introducing a new connection between the MoT and the evolution Galerkin approach. At the same time, we clarify some important differences between these two approaches.
Mathematics Subject Classification: 35C15 / 35L65 / 65D32 / 65M25 / 76M12 / 76N15 / 76P05
Key words: Systems of conservation laws / Fey's method of transport / Euler equations / Boltzmann equation / kinetic schemes / bicharacteristic theory / state decompositions / flux decompositions / exact and approximate integral representations / quadrature rules.
© EDP Sciences, SMAI, 2004