THE APPLICATIONS OF AN UNSTRUCTURED GRID BASEDOVERSET GRID SCHEME TO APPLIED AERODYNAMICS

ABSTRACT The traditional structured grid based chimera grid scheme is extended to include the unstructured hexahedrons asthe component grids. Recent developments of a quadrilateral based radiated grid (also known as hair grid) and a hexahedral based tree grid generators are described. The main input method for the quadrilateral dominated sur-face mesh generator is through IGES files from most CAD packages. Example is given for X-38, a crew return spacecraft designed by JSC/NASA. Keywords: mesh generation, chimera, overset, quadrilateral, hexahedral, IGES, tree grid