Artificial dissipation sensors for computational gasdynamics
Abstract
Artificial dissipation and physically based dissipation models for explicitly added nonphysical dissipation in Euler equations of gasdynamics have been compared for the case of a shocked, steady, internal flow. A dissipation sensor function determines the amount of the local dissipation in both formulations. Several new models for the dissipation sensors were introduced and tested. They are based on: second derivative of pressure, gradient of pressure, gradient of Mach number, entropy, vorticity, and divergence of velocity vector. Their ability to generate sharp shocks and their influence on iterative convergence rate were examined indicating the importance of choosing a proper sensor.
- Publication:
-
27th AIAA Aerospace Sciences Meeting
- Pub Date:
- January 1989
- Bibcode:
- 1989aiaa.meetV....D
- Keywords:
-
- Computational Fluid Dynamics;
- Computerized Simulation;
- Euler Equations Of Motion;
- Gas Dynamics;
- Convergence;
- Iteration;
- Fluid Mechanics and Heat Transfer