All‐hexahedral mesh smoothing with a node‐based measure of quality

Published in Int. J. Numer. Meth. Engng. Vol. 50 (8), pp. 1957-1967, 2001
doi: 10.1002/nme.104

Abstract

This research work deals with the analysis and test of a normalized‐Jacobian metric used as a measure of the quality of all‐hexahedral meshes. Instead of element qualities, a measure of node quality was chosen. The chosen metric is a bound for deviation from orthogonality of faces and dihedral angles. We outline the main steps and algorithms of a program that is successful in improving the quality of initially invalid meshes to acceptable levels. For node movements, the program relies on a combination of gradient‐driven and simulated annealing techniques. Some examples of the results and speed are also shown.