Yade

Control edge length in Tesselation Wrapper?

Asked by Luc Scholtès

Hi guys,

I had a look at Tesselation Wrapper but could not really find where to start from.

I run simulations where the packing has an initial hole in it which is significantly bigger than the particles and I would like to use Tesselation Wrapper to post-process the strain field. It works but tesselation is done also across the hole and I would like to avoid that so that the the empty region remains actually empty when I visualize it.

Would there be a way to restrict the size of the tetrahedron's edge in Tesselation Wrapper so that tesselation does not occur across the hole? I also tried to do this selection directly in Paraview but couldn't succeed...

Many thanks in advance

Luc

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Bruno Chareyre (bruno-chareyre) said : 		#1

Hi Luc,
The cure to this disease is called "alpha shape", I have work in progress about that [1] but it is still in the state of independent pieces of code outside yade. It is a difficult problem for which and I don't see any simple workaround.
Bruno
[1] http://perso.3sr-grenoble.fr/users/bchareyre/nolist/nolist_temp/figTriax+Trou.png

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Luc Scholtès (luc) said : 		#2

Unfortunately, I cannot download the file but thanks anyway for your answer.

I did not think it would be so problematic to restrain the tesselation to a certain range (by avoiding edges to be bigger than a given value which could be, e.g., a function of the particle size) but I guess the difficulty comes afterwards, in the operations performed on the mesh, right?

Please tell me if I can help in anyway.

Thanks

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