an:00987986
Zbl 0873.65088
Billett, S. J.; Toro, E. F.
On WAF-type schemes for multidimensional hyperbolic conservation laws
EN
J. Comput. Phys. 130, No. 1, 1-24 (1997).
00039023
1997
j
65M06 65M12 76B15 65M60 35L65
weighted average flux; finite volume schemes; second-order Godunov-type methods; MUSCL; piecewise constant Riemann problem; upwinding; stability; spurious oscillations; numerical experiments; shallow water equations
The aim of the paper is to explore how the weighted average flux (WAF) approach can be used to generate finite volume schemes in more than one space dimension. There is a large class of second-order Godunov-type methods (e.g. MUSCL). The WAF-type schemes can be considered as an alternative approach for constructing second-order Godunov-type methods. Its key feature is that the second-order accuracy is achieved by solving the piecewice constant Riemann problem as in the first-order Godunov method, no reconstruction step is necessary. The accuracy comes from utilizing this solution averaged over space and time.
Multidimesional schemes are obtained reproducing the first-order CTU scheme of \textit{P. Colella} [J. Comput. Phys. 87, No. 1, 171-200 (1990; Zbl 0694.65041)] and using the WAF approach. The authors derive two new second-order finite volume schemes. They are conservative, second-order accurate in space and time, have mulidimensional upwinding aspects and good stability properties. Spurious oscillations are controlled by the use of one-dimensional TVD limiter functions. Numerical experiments, presented for the shallow water equations in two space dimensions, confirm reliability of the schemes.
M.Kukacova (Brno)
Zbl 0694.65041