23rd International Meshing Roundtable
Stanford University, Department of Mechanical Engineering, Stanford, California, U.S.A.
Sandia National Laboratories, Albuquerque, NM, U.S.A.
Automatic, all-hex meshes are required in many environments. However, current methods can produce unacceptable results where
geometric features or topologic connectivity impose limiting constraints. Collapsing a small number of edges or faces in an allhex
mesh to produce degenerate hex elements may be sucient to turn an otherwise unusable mesh into an adequate mesh for
computational simulation. We propose a post-processing procedure that will operate on an existing all-hex mesh by identifying
and collapsing edges and faces to improve element quality followed by local optimization-based smoothing. We also propose a new
metric based upon the scaled Jacobian that can be used to determine element quality of a degenerate hex element. In addition we
illustrate the eectiveness of degenerate elements in analysis and provide numerous meshing examples using the sculpt meshing
procedure modified to incorporate degeneracies.
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