Automatic coarsening of three dimensional anisotropic unstructured meshes for multigrid applications
نویسندگان
چکیده
منابع مشابه
Automatic coarsening of three dimensional anisotropic unstructured meshes for multigrid applications
This paper describes an algorithm designed for the automatic coarsening of three-dimensional unstructured simplicial meshes. This algorithm can handle very anisotropic meshes like the ones typically used to capture the boundary layers in CFD with Low Reynolds turbulence modeling that can have aspect ratio as high as 10. It is based on the concept of mesh generation governed by metrics and on th...
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This work is devoted to the design of a mesh generation technique able to produce a sequence of 3-D coarsened unstructured meshes from an initial anisotropic one. The coarsening algorithm uses an initial mesh and a metric eld obtained from an analysis of the natural metric of this initial mesh. First, an initial natural metric (i.e a metric into which each simplicial element of the mesh is equi...
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Unstructured multigrid techniques for relieving the stiffness associated with high-Reynolds number viscous flow simulations on extremely stretched grids are investigated. One approach consists of employing a semi-coarsening or directional-coarsening technique, based on the directions of strong coupling within the mesh, in order to construct more optimal coarse grid levels. An alternate approach...
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An overview of current multigrid techniques for unstructured meshes is given. The basic principles of the multigrid approach are first outlined. Application of these principles to unstructured mesh problems is then described, illustrating various different approaches, and giving examples of practical applications. Advanced multigrid topics, such as the use of algebraic multigrid methods, and th...
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ژورنال
عنوان ژورنال: Applied Mathematics and Computation
سال: 2012
ISSN: 0096-3003
DOI: 10.1016/j.amc.2012.04.014