Finite difference computation of blast diffraction
Abstract
This paper discusses the use of numerical finite difference methods for predicting flow fields in which a shock or blast wave is diffracted at a sharp edge. Three different types of method are studied: Donor Cell differencing with and without Flux Corrected Transport, a Finite Volume method with an explicit artificial viscosity and Runge-Kutta time stepping, and a second order upwind method based on the solution of a Riemann wave problem at cell interfaces. In the case of weak shock waves a comparison is made with the flow field predicted by acoustic theory including flow separation. Results for stronger shocks are also presented.
- Publication:
-
AIAA, 18th Fluid Dynamics and Plasmadynamics and Lasers Conference
- Pub Date:
- July 1985
- Bibcode:
- 1985fdpd.confS....H
- Keywords:
-
- Blast Deflectors;
- Computational Fluid Dynamics;
- Detonation Waves;
- Finite Difference Theory;
- Shock Wave Interaction;
- Wave Diffraction;
- Cauchy Problem;
- Edges;
- Finite Volume Method;
- Pressure Distribution;
- Runge-Kutta Method;
- Separated Flow;
- Shock Tubes;
- Unsteady Flow;
- Vortex Shedding;
- Fluid Mechanics and Heat Transfer