A Method for Controlling Skew on Linked Surfaces

A new method for lessening skew in mapped meshes is presented. This new method involves progressive subdivision of a surface into loops consisting of four sides. Using these loops, constraints can then be set on the curves of the surface, which will propagate interval assignments across the surface, allowing a mesh with a better skew metric to be generated

A Multiple Source and Target Sweeping Method for Generating All Hexahedral Finite Element Meshes

: This paper presents an algorithm to enhance the capabilities of generating all hexahedral finite element meshes by the sweeping process. Traditional sweeping techniques are very useful and robust. They create meshes by projecting an existing single-surface mesh along a specified trajectory to a specified singletarget surface. In this process the source surface is meshed by any surface meshing algorithm while the sides that couple the source to the target are limited to a regular mapped quadrilateral mesh. This process is often called two and one half dimensional meshing. The procedure presented in this paper enhances this traditional technique by developing a projection technique that minimizes mesh distortion; and allows multiple connected surfaces to single target, multiple unconnected surfaces to single target, and multiple unconnected surfaces to multiple unconnected target sweeping. Keywords: Sweeping, Hexahedrons, Multiple Targets 1. Introduction Swept representations are base..

The Graft Tool: An All-Hexahedral Transition Algorithm For Creating A Multi-Directional Swept Volume Mesh

Sweeping algorithms have become very mature and can create a semi-structured mesh on a large set of solids. However, these algorithms require that all linking surfaces be mappable or submappable. This restriction excludes solids with imprints or protrusions on the linking surfaces. The grafting algorithm allows these solids to be swept. It then locally modifies the position and connectivity of the nodes on the linking surfaces to align with the graft surfaces. Once a high-quality surface mesh is formed on the graft surface, it is swept along the branch creating a 2-D mesh. Keywords: mesh generation, hexahedral meshing, refinement, sweeping, 2-D * This work was partly funded by Sandia National Laboratories, operated for the U.S. DOE under contract No. DE-AL0494AL8500. Sandia is a multiprogram laboratory operated by Sandia Corporation, a Lockheed Martin Company, for the U.S. DOE. # Scott Mitchell, [email protected], was supported by the Mathematical, Information and Computational ..