Mesh deformation and reconstruction for time evolving domains
Timothy J. Baker · 15th AIAA Computational Fluid Dynamics Conference · 2001
Dynamic adaptation of unstructured meshes can be implemented efficiently as a three stage sequence: mesh movement followed by mesh coarsening and then mesh enrichment. A valid mesh is maintained at all times which obviates the need to remesh pockets or holes, a feature typical of most alternative approaches to this problem. The robustness of this method depends heavily on the ability to prevent any degradation in mesh quality during each adaptation cycle. This in turn is strongly influenced by the ability to (i) identify cells that are badly distorted after the mesh movement phase, and (ii) the ability to remove these bad quality cells by a combination of mesh coarsening and mesh smoothing. We describe improved techniques to handle both topics which provide a more robust handling of dynamic adaptation for unstructured meshes on 3D domains.