An Alignment Algorithm for Anisotropic Meshes with Non-Uniform Flow Fields

Alper Üngör

Proc. of 7th Int. Numerical Grid Generation, Whistler, Canada, 2000

Abstract:

Anisotropic meshes that are adaptive both in size and shape are critical for numerical accuracy of various problems, such as convection dominated problems. A good unstructured anisotropic meshing algorithm uses elements of properly chosen size, shape and direction that adapt to the geometry and flow field of the physical problem. This paper presents an algorithm to align a mesh with respect to the desired anisotropy. Based on a simple topology change operation, the algorithm is simple and efficient. Having been designed for handling non-uniform flow fields, it is an improvement of an existing uniform flow field alignment algorithm.