[gts-general] automated parameter-setting for optimized mesh simplification in gts

[Márcio R. P. <pi...@gm...>]

Hi, all.

I use GTS to develop a code to simulate multiphase flows via Front-Tracking.
In order to improve mass conservation, I use the Lindstrom & Turk algorithm
for mesh simplification. However, while the algorithm seems to be quite
insensitive to the volume_weight and boundary_weight parameters, I can't
find a way to automate the shape_weight setup. For small values, it coarsens
the surface to a tetrahedron. For greater values it works fine, but
occasionally generates some elements with *extremely high aspect ratios*,
reaching 1:1000 sometimes. Is this behavior expected?

In order to overcome this problem, I apply a non-conservative coarsening
step. However, the algorithm does nothing when only one or two tiny edges
are found. Is there a trick to overcome this? Am I doing something wrong?


Thanks in advance


Márcio


-- 
Márcio Ricardo Pivello
Universidade Federal de Uberlândia
Faculdade de Engenharia Mecânica
Laboratório de Mecânica dos Fluidos
+55 (34) 3239 4040 ramal 618