Local Solution-Based Mesh Adaptation for Unstructured Grids in Complex 3D Domains

In an effort to improve the robustness and efficiency of mesh adaptation, this work proposes an adaptive re-meshing method that can be used for variety of problems in CFD. It should be noted that this method is feature driven adaptivity and that it does not use strategies such as edge split, edge collapse, edge swap, etc as were employed in mesh modifications [2]. Instead, it defines the ”holes” locally based on an output-based indicator and re-meshes these regions independently. The surface re-meshing is performed using advancing front algorithm and volume re-meshing is based on Delaunay triangulation. The proposed re-meshing method is completely automatic and no user intervention is required. In addition, it can perform mesh adaptation robustly and effectively for complex configurations, especially for domains with curved boundaries. The numerical examples show that the use of the proposed adaptation strategy in three dimensions offers a great potential in having low cost CFD simulations with high quality mesh.