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Volume Mesh Adaptation With a Meshfree Surface Model

Rassineux, A., P. Breitkopf, C. Chappuis, P. Villon

Proceedings, 11th International Meshing Roundtable, Springer-Verlag, pp.253-260, September 15-18 2002

INTERNATIONAL
MESHING
ROUNTABLE

11th International Meshing Roundtable
Ithaca, New York, USA.
September 15-18 2002

UniversitÈ de Technologie de CompiËgne,
Laboratoire Roberval,
Centre de Recherches de Royallieu, BP20529, 60206
CompiËgne Cedex, France

Abstract
We present a method to adapt a tetrahedron mesh together with a surface mesh with respect to a size criterion. Both surface and tetrahedron mesh adaptation are carried out simultaneously and no CAD is required to adapt the surface mesh. The adaptation procedure consists in splitting or removing interior and surface edges in order to enforce a given size criterion. The enrichment process is based on a bisection technique. Mesh conformity during the refinement process is guaranteed since all possible remeshing configurations of tetrahedra are examined. Surface nodes are projected on a geometrical model once the tetrahedron mesh has been adapted. The building of a surface model method is based on a meshfree technique denoted as Hermite Diffuse Interpolation. Surface and volume mesh optimization procedures are carried out during the adaptation and at the end of the process to enhance the mesh.

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