Wave Speeds, Riemann Solvers and Artificial Viscosity
Conference
·
OSTI ID:760447
A common perspective on the numerical solution of the equation Euler equations for shock physics is examined. The common viewpoint is based upon the selection of nonlinear wavespeeds upon which the dissipation (implicit or explicit) is founded. This perspective shows commonality between Riemann solver based method (i.e. Godunov-type) and artificial viscosity (i.e. von Neumann-Richtmyer). As an example we derive an improved nonlinear viscous stabilization of a Richtmyer-Lax-Wendroff method. Additionally, we will define a form of classical artificial viscosity based upon the HLL Riemann solver.
- Research Organization:
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
- Sponsoring Organization:
- US Department of Energy (US)
- DOE Contract Number:
- W-7405-ENG-36
- OSTI ID:
- 760447
- Report Number(s):
- LA-UR-99-2618; TRN: AH200103%%353
- Resource Relation:
- Conference: 22nd International Symposium on Shock Waves (ISSW22), London (GB), 07/18/1999--07/23/1999; Other Information: PBD: 18 Jul 1999
- Country of Publication:
- United States
- Language:
- English
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