Unstructured and Adaptive Mesh Generation for High Reynolds Number Viscous Flows
INSTITUTE FOR COMPUTER APPLICATIONS IN SCIENCE AND ENGINEERING HAMPTON VA
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A method for generating and adaptively refining a highly stretched unstructured mesh, suitable for the computation of high-Reynolds-number viscous flows about arbitrary two-dimensional geometries has been developed. The method is based on the Delaunay triangulation of a predetermined set of points and employs a local mapping in order to achieve the high stretching rates required in the boundary-layer and wake regions. The initial mesh-point distribution is determined in a geometry-adaptive manner which clusters points in regions of high curvature and sharp corners. Adaptive mesh refinement is achieved by adding new points in regions of large flow gradients, and locally retriangulating, thus obviating the need for global mesh regeneration. Initial and adaptive meshes about complex multi-element airfoil geometries are shown and compressible flow solutions are computed on these meshes.
- Fluid Mechanics