Development of a fully systemized chimera methodology for steady/unsteady problems

A new systemized procedure for chimera-domain decomposition is presented. T his procedure consists of a new cut-paste algorithm for optimal mesh interf ace and a two-step search method for donor cell identification. It is fully automated and requires minimal user input. The cut-paste algorithm Is base d on the advancing front technique in which the fronts are iteratively dete rmined from the initial fronts, which are a collection of fringe points obt ained from conventional Chimera hole cutting. The final fronts are determin ed iteratively in such a way that the overlapping region is minimized. With this method, interpolation points are located away from solid walls where flow gradient is high. We also can reduce the error that may arise from int erpolation in stiff gradient regions. Two- and three-dimensional examples a re chosen to demonstrate the effectiveness of this new procedure.