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<div><font color="#1F497D">I forgot to say that the crash happens under Windows 7 with gmsh 2.8.0 64bit and with 2.7.1 32bit and 64bit.</font></div>
<div><font color="#1F497D"> </font></div>
<div><font color="#1F497D">Matthias</font></div>
<div> </div>
<div style="padding-left:35.4pt;"><font face="Tahoma" size="2" color="#1F497D"><span style="font-size:10pt;"> <font color="black">_____________________________________________<br>
</font><font color="black"><b>Von:</b></font><font color="black"> Zenker, Dr. Matthias
<br>
</font><font color="black"><b>Gesendet:</b></font><font color="black"> Donnerstag, 11. Juli 2013 16:57<br>
</font><font color="black"><b>An:</b></font><font color="black"> 'gmsh@geuz.org'<br>
</font><font color="black"><b>Cc:</b></font><font color="black"> 'Christophe Geuzaine [cgeuzaine@ulg.ac.be] (cgeuzaine@ulg.ac.be)'<br>
</font><font color="black"><b>Betreff:</b></font><font color="black"> crash on 3D meshing (AW: Anisiotropic mesh in stacked layers)</font></span></font></div>
<div style="padding-left:35.4pt;"> </div>
<div style="padding-left:35.4pt;"> </div>
<div style="padding-left:35.4pt;"><font color="#1F497D">Hi,</font></div>
<div style="padding-left:35.4pt;"><font color="#1F497D"> </font></div>
<div style="padding-left:35.4pt;"><font color="#1F497D">now that I have successfully created a anisotropic mesh width field for my geometry, I get a crash when I do the 3D meshing. 2D meshing works without problem. I have the impression that the desired mesh
width may be too small. Is this so, and what is the smallest mesh width gmsh can cope with?</font></div>
<div style="padding-left:35.4pt;"><font color="#1F497D"> </font></div>
<div style="padding-left:35.4pt;"><font color="#1F497D">Thanks for an answer, this time…</font></div>
<div style="padding-left:35.4pt;"><font color="#1F497D"> </font></div>
<div style="padding-left:35.4pt;"><font color="#1F497D">Matthias</font></div>
<div style="padding-left:35.4pt;"><font color="#1F497D"> </font></div>
<div style="padding-left:35.4pt;"> < Datei: layers.geo >> </div>
<div style="padding-left:70.8pt;"><font face="Tahoma" size="2"><span style="font-size:10pt;">_____________________________________________<br>
<b>Von:</b> Zenker, Dr. Matthias <br>
<b>Gesendet:</b> Donnerstag, 11. Juli 2013 16:41<br>
<b>An:</b> 'gmsh@geuz.org'<br>
<b>Cc:</b> 'Christophe Geuzaine [cgeuzaine@ulg.ac.be] (cgeuzaine@ulg.ac.be)'<br>
<b>Betreff:</b> AW: Anisiotropic mesh in stacked layers</span></font></div>
<div style="padding-left:70.8pt;"> </div>
<div style="padding-left:70.8pt;"> </div>
<div style="padding-left:70.8pt;"><font color="#1F497D">Hi again,</font></div>
<div style="padding-left:70.8pt;"><font color="#1F497D"> </font></div>
<div style="padding-left:70.8pt;"><font color="#1F497D">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?</font></div>
<div style="padding-left:70.8pt;"><font color="#1F497D">I have read the relevant part of the gmsh manual, but didn’t find the answer there.</font></div>
<div style="padding-left:70.8pt;"><font color="#1F497D">A short explanation and/or a pointer to more info would be highly appreciated.</font></div>
<div style="padding-left:70.8pt;"><font color="#1F497D"> </font></div>
<div style="padding-left:70.8pt;"><font color="#1F497D">Matthias</font></div>
<div style="padding-left:70.8pt;"> </div>
<div style="padding-left:106.2pt;"><font face="Tahoma" size="2"><span style="font-size:10pt;">_____________________________________________<br>
<b>Von:</b> Zenker, Dr. Matthias <br>
<b>Gesendet:</b> Mittwoch, 10. Juli 2013 17:09<br>
<b>An:</b> <a href="mailto:gmsh@geuz.org"><font color="blue"><u>gmsh@geuz.org</u></font></a><br>
<b>Cc:</b> Christophe Geuzaine [cgeuzaine@ulg.ac.be] (<a href="mailto:cgeuzaine@ulg.ac.be"><font color="blue"><u>cgeuzaine@ulg.ac.be</u></font></a>)<br>
<b>Betreff:</b> Anisiotropic mesh in stacked layers</span></font></div>
<div style="padding-left:106.2pt;"> </div>
<div style="padding-left:106.2pt;"> </div>
<div style="padding-left:106.2pt;">Hi,</div>
<div style="padding-left:106.2pt;"> </div>
<div style="padding-left:106.2pt;">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?</div>
<div style="padding-left:106.2pt;">How is the mesh width derived from the m11, m22 and m33 fields in MathEvalAniso?</div>
<div style="padding-left:106.2pt;"> </div>
<div style="padding-left:106.2pt;">Thanks for some explanations and hints,</div>
<div style="padding-left:106.2pt;"> </div>
<div style="padding-left:106.2pt;">Matthias</div>
<div style="padding-left:106.2pt;"> </div>
<div style="padding-left:106.2pt;"> < Datei: layers.geo >> </div>
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