A three-dimensional hybrid grid generation technique
Ralph W. Noack, John P. Steinbrenner · 1995
A three-dimensional hybrid grid generation technique is described. The method combines structured grids with unstructured triangular or tetrahedral meshes and Cartesian quad/octree grids to provide great flexibility in discretizing a domain. The method utilizes as input a set of structured quadrilateral or hexahedral cell grids that may overlap each other and may not completely cover the domain of interest. An advancing front grid generation algorithm is used to trim the structured grids and remove any overlap. Once the trimming process is complete the grid generator is restarted as a conventional unstructured grid generator starting from the front produced from the trimming process. The voids in the domain of interest are then filled with unstructured triangular or tetrahedral cells. The method will be illustrated with results for a two-dimensional multiple element airfoil and three-dimensional cases including an isolated wing and a pylon-store configuration.