Unsteady three dimensional Euler solutions on moving grids
Abstract
A method for predicting unsteady, three dimensional compressible flows governed by the Euler system of equations is presented. The approach uses the Euler-Lagrange formulation, a finite volume scheme based on Roe's approximate Riemann solver (1981) and unstructured moving grids. To achieve flexibility in the aspects related to the geometric representation as well as grid management, tetrahedra have been used as the elementary discretization cells. An algorithm for the management and coupling of moving tetrahedra with the flow solver has been devised. The method has been tested on static and moving meshes and the results show the correct behavior of different flow fields. Some preliminary results for simple geometries are presented. These address the oblique shock wave in the flow past a dihedron, flow in a three dimensional channel, and flow inside a cube with a moving face.
- Publication:
-
4th CASI Aerodynamics Symposium
- Pub Date:
- 1993
- Bibcode:
- 1993casi.symp..126I
- Keywords:
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- Compressible Flow;
- Unsteady Flow;
- Computational Grids;
- Euler Equations Of Motion;
- Finite Volume Method;
- Mathematical Models;
- Shock Waves;
- Fluid Mechanics and Heat Transfer