Automatic Scheme Selection for Toolkit Hex Meshing

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Description

Current hexahedral mesh generation techniques rely on a set of meshing tools, which when combined with geometry decomposition leads to an adequate mesh generation process. Of these tools, sweeping tends to be the workhorse algorithm, accounting for at least 50% of most meshing applications. Constraints which must be met for a volume to be sweepable are derived, and it is proven that these constraints are necessary but not sufficient conditions for sweepability. This paper also describes a new algorithm for detecting extruded or sweepable geometries. This algorithm, based on these constraints, uses topological and local geometric information, and is more ... continued below

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31 p.

Creation Information

TAUTGES,TIMOTHY J. & WHITE,DAVID R. September 27, 1999.

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  • Sandia National Laboratories
    Publisher Info: Sandia National Labs., Albuquerque, NM, and Livermore, CA
    Place of Publication: Albuquerque, New Mexico

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Description

Current hexahedral mesh generation techniques rely on a set of meshing tools, which when combined with geometry decomposition leads to an adequate mesh generation process. Of these tools, sweeping tends to be the workhorse algorithm, accounting for at least 50% of most meshing applications. Constraints which must be met for a volume to be sweepable are derived, and it is proven that these constraints are necessary but not sufficient conditions for sweepability. This paper also describes a new algorithm for detecting extruded or sweepable geometries. This algorithm, based on these constraints, uses topological and local geometric information, and is more robust than feature recognition-based algorithms. A method for computing sweep dependencies in volume assemblies is also given. The auto sweep detect and sweep grouping algorithms have been used to reduce interactive user time required to generate all-hexahedral meshes by filtering out non-sweepable volumes needing further decomposition and by allowing concurrent meshing of independent sweep groups. Parts of the auto sweep detect algorithm have also been used to identify independent sweep paths, for use in volume-based interval assignment.

Physical Description

31 p.

Notes

OSTI as DE00014061

Medium: P; Size: 31 pages

Source

  • 8th International Meshing Roundtable, South Lake Tahoe, CA (US), 10/10/1999--10/13/1999

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  • Report No.: SAND99-2539C
  • Grant Number: AC04-94AL85000
  • Office of Scientific & Technical Information Report Number: 14061
  • Archival Resource Key: ark:/67531/metadc620086

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  • September 27, 1999

Added to The UNT Digital Library

  • June 16, 2015, 7:43 a.m.

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  • April 12, 2017, 1:10 p.m.

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TAUTGES,TIMOTHY J. & WHITE,DAVID R. Automatic Scheme Selection for Toolkit Hex Meshing, article, September 27, 1999; Albuquerque, New Mexico. (digital.library.unt.edu/ark:/67531/metadc620086/: accessed October 22, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.