Automatic Structured and Unstructured Grid Cell Remediation for Overset Meshes

An automated method for the remediation of disparities in cell sizes in the vicinity of communication locations in overset meshes is presented. The method employs different techniques for structured and unstructured grids. For structured cells, where grid cell counts are fixed, an adaptive grid redistribution method based on the parametric solution of the elliptic equations has been revisited and extended to the overset problem. This method has been demonstrated to be effective in modifying local cell sizes to approximate foreign cells. A tensor-based technique is presented to transfer the directional structured cell size information from the foreign mesh to the local mesh. For unstructured grids, vertex insertion methods are used to refine the mesh, again to reduce the disparity in size between local and foreign cells. Each method computes target lengths at existing mesh points, superimposes foreign cell edge lengths at interpolation locations, and then smooths the values to propagate the foreign cell influence into the mesh. Examples are provided for each mesh type, along with recommendations for future work.