An Efficient Multigrid Method for Overlapped Grid System to Integrated System Analysis

A technique for the generation of overlapped grid using a simple shooting method, that is a cut-paste algorithm, is presented. It makes possible to generate overlapping grids with moderate mesh interface region. To generate overlapped grids with minimal amount of user inputs, the advancing-front technique using the fringe points as facets is used. To remove hole points initially, fronts using solid bodies and the zones of interference algorithm are used. The overlapped grids are generated for several cases using present algorithms and Euler equations are solved for two/three-dimensional steady state flow fields. To demonstrate the capability of present method, the two dimensional store separation with trajectory mode of three-DOF is computed in an unsteady flow field.

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