[Gmsh] Anisiotropic mesh in stacked layers

[Zenker, Dr. Matthias]

Hi again,

I have got it to work, but I still don't understand why. It seems that the fields in MathEvalAniso have to be 1/(mesh_width)^2. But why?
I have read the relevant part of the gmsh manual, but didn't find the answer there.
A short explanation and/or a pointer to more info would be highly appreciated.

Matthias

     _____________________________________________
     Von: Zenker, Dr. Matthias
     Gesendet: Mittwoch, 10. Juli 2013 17:09
     An: gmsh at geuz.org
     Cc: Christophe Geuzaine [cgeuzaine at ulg.ac.be] (cgeuzaine at ulg.ac.be)
     Betreff: Anisiotropic mesh in stacked layers


     Hi,

     I want to mesh a geometry with layers stacked in z direction, where each layer should have a mesh width in the xy plane, and a different one in z direction. I have tried to combine the Box, Min and MathEval Aniso fields to achieve this (see attachment). But the mesh widths are not as I expect, in particular in layer 2 in z direction it should be 1/20 its height. What do I do wrong?
     How is the mesh width derived from the m11, m22 and m33 fields in MathEvalAniso?

     Thanks for some explanations and hints,

     Matthias

      < Datei: layers.geo >>



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