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Block-Structured Hexahedral Meshes for CAD Models using 3D Frame Fields

Kowalski, N. and F. Ledoux, P. Frey

23rd International Meshing Roundtable, Elsevier Ltd., October 12-15 2014


23rd International Meshing Roundtable
London, UK
October 12-15,2014

Universite Catholique de Louvain, Avenue Georges Lematre, 4, B-1348 Louvain-la-Neuve, Belgium
CEA, DAM, DIF, F-91297, Arpajon, France
UniversitĀ„e Pierre et Marie Curie, 4 place Jussieu, 75005, Paris, France

In the past couple of years, techniques using 3D frame fields have emerged to design hexahedral meshes. Those methods are based on a two-step process where a 3D frame field is built by assigning a frame to each cell of a tetrahedral mesh, then a parametrization algorithm is applied to generate a hexahedral mesh. In this paper, we propose a novel algorithm to generate blockstructured hexahedral meshes for any CAD domain . This work differs from previous ones in several points: (1) the proposed approach does not start from a pre-meshed boundary; (2) The frame field initialization does not put singularity lines around the medial object of CAD domain ; (3) Frames are assigned to the vertices and not to the cells of the tetrahedral mesh; (4) We do not perform a parametrization process but we generate a block structure that partition in meshable regions.

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