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Automatic Decomposition and Efficient Semi-structured Meshing of Complex Solids

Makem, Jonathan E., Cecil G. Armstrong and Trevor T. Robinson

20th International Meshing Roundtable, Springer-Verlag, pp.199-215, October 23-26 2011

IMR
PROCEEDINGS

20th International Meshing Roundtable
Paris, France
October 23-26, 2011

School of Mechanical and Aerospace Engineering, Queen's University, Belfast BT9 5AH, N. Ireland
Email:j.makem@qub.ac.uk

Summary
In this paper, a novel approach to automatically sub-divide a complex geometry and apply an efficient mesh is presented. Following the identification and removal of thin-sheet regions from an arbitrary solid using the thick/thin de-composition approach developed by Robinson et al [1], the technique here employs shape metrics generated using local sizing measures to identify long, slender regions within the thick body. A series of algorithms automatically partition the thick region into a non-manifold assembly of long, slender and complex subregions. A structured anisotropic mesh is applied to the long/slender bodies and the remaining complex bodies are filled with unstructured isotropic tetrahedra. The resulting semi-structured mesh possesses significantly fewer degrees of freedom than the equivalent unstructured mesh, validating the effectiveness of the approach.

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