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Tetrahedral Mesh Improvement using Moving Mesh Smoothing and~Lazy Searching Flips

Dassi, Franco, Lennard Kamenski, Hang Si

Proceedings, 25th International Meshing Roundtable, Elsevier, Science Direct, September 26-30 2016

INTERNATIONAL
MESHING
ROUNTABLE

25th International Meshing Roundtable
Washington DC, U.S.A.
September 26-30, 2016

Franco Dassi, Weierstrass Institute for Applied Analysis and Stochastics, DE, franco.dassi@wias-berlin.de
Lennard Kamenski, Weierstrass Institute for Applied Analysis and Stochastics, DE, kamenski@wias-berlin.de
Hang Si, Weierstrass Institute for Applied Analysis and Stochastics, DE, si@wias-berlin.de

Abstract
In this paper we combine two new smoothing and flipping techniques. The moving mesh smoothing is based on the integration of an ordinary differential coming from a given functional. The lazy flip technique is a reversible edge removal algorithm to automatically search flips for local quality improvement. On itself, these strategies already provide good mesh improvement, but their combination achieves astonishing results which have not been reported so far. Provided numerical examples show that we can obtain final tetrahedral meshes with dihedral angles between $\ang{40}$ and $\ang{123}$. We compare the new method with other publicly available mesh improving codes.

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