Implicit-explicit Runge-Kutta schemes and applications to hyperbolic systems with relaxation

Details Implicit-explicit Runge-Kutta schemes and applications to hyperbolic systems with relaxation Implicit-explicit Runge-Kutta schemes and applications to hyperbolic systems with relaxation

2010-09-14

arxiv.org/abs/1009.2757v1

Journal of Scientific Computing, 25, (2005), 129-155

Mathematics

Numerical Analysis

Scientific paper

We consider new implicit-explicit (IMEX) Runge-Kutta methods for hyperbolic systems of conservation laws with stiff relaxation terms. The explicit part is treated by a strong-stability-preserving (SSP) scheme, and the implicit part is treated by an L-stable diagonally implicit Runge-Kutta methods (DIRK). The schemes proposed are asymptotic preserving (AP) in the zero relaxation limit. High accuracy in space is obtained by Weighted Essentially Non Oscillatory (WENO) reconstruction. After a description of the mathematical properties of the schemes, several applications will be presented.

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