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Geometric Algorithms for 3D Interface Reconstruction

Ahn, Hyung Taek and Mikhail Shashkov

Proceedings, 16th International Meshing Roundtable, Springer-Verlag, pp.405-422, October 14-17 2007

IMR
PROCEEDINGS

16th International Meshing Roundtable
Seattle, Washington, U.S.A.
October 14-17, 2007

1 Los Alamos National Laboratory [email] htahn@lanl.gov
2 Los Alamos National Laboratory [email] shashkov@lanl.gov

Abstract
We describe geometrical algorithms for interface reconstructions for 3D generalized polyhedral meshes. Three representative piece-wise linear interface calculation methods are considered, namely gradient based method, least squares volume-of-fluid interface reconstruction algorithm, and moment-of-fluid method. Geometric algorithms for the 3D interface reconstructions are described. Algorithm for the intersection of a convex polyhedron with half-space is presented with degenerate cases. Fast iterative methods for volume matching interface computation are introduced. The numerical optimization method for interface normal computation is presented, and its super-linearly convergence is demonstrated. Finally, actual reconstruction of complex geometry is demonstrated.

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