<html><head><meta http-equiv="Content-Type" content="text/html charset=windows-1252"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><br><div><div>Le 11 juil. 2013 à 22:57, Christophe Geuzaine <<a href="mailto:cgeuzaine@ulg.ac.be">cgeuzaine@ulg.ac.be</a>> a écrit :</div><br class="Apple-interchange-newline"><blockquote type="cite"><br>Hi Matthias,<br><br>There are two separate problems:<br><br>1) Currently MMG3D does not like having internal surfaces in the volume. Attached is a file with a single volume, which works ok.<br><br>@JF : have you tried MMG3D in such cases with internal surfaces?<br><br></blockquote><div><br></div><div><br></div><div>Not done … it seems complicated</div><br><blockquote type="cite">2) "h2 / 100" pushes the initial tetrahedralization to the limit; h2/90 works fine over here.<br><br>All of this is still very experimental, though. It all needs to be tested and documented.<br><br>Thanks for the feedback!<br><br>Christophe<br><br><span><layers.geo></span><br><br>On 11 Jul 2013, at 17:29, "Zenker, Dr. Matthias" <<a href="mailto:Matthias.Zenker@erbe-med.com">Matthias.Zenker@erbe-med.com</a>> wrote:<br><br><blockquote type="cite">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.<br><br>Matthias<br><br>_____________________________________________<br>Von: Zenker, Dr. Matthias <br>Gesendet: Donnerstag, 11. Juli 2013 16:57<br>An: '<a href="mailto:gmsh@geuz.org">gmsh@geuz.org</a>'<br>Cc: 'Christophe Geuzaine [<a href="mailto:cgeuzaine@ulg.ac.be">cgeuzaine@ulg.ac.be</a>] (<a href="mailto:cgeuzaine@ulg.ac.be">cgeuzaine@ulg.ac.be</a>)'<br>Betreff: crash on 3D meshing (AW: Anisiotropic mesh in stacked layers)<br><br><br>Hi,<br><br>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?<br><br>Thanks for an answer, this time…<br><br>Matthias<br><br>< Datei: layers.geo >><br>_____________________________________________<br>Von: Zenker, Dr. Matthias <br>Gesendet: Donnerstag, 11. Juli 2013 16:41<br>An: '<a href="mailto:gmsh@geuz.org">gmsh@geuz.org</a>'<br>Cc: 'Christophe Geuzaine [<a href="mailto:cgeuzaine@ulg.ac.be">cgeuzaine@ulg.ac.be</a>] (<a href="mailto:cgeuzaine@ulg.ac.be">cgeuzaine@ulg.ac.be</a>)'<br>Betreff: AW: Anisiotropic mesh in stacked layers<br><br><br>Hi again,<br><br>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?<br>I have read the relevant part of the gmsh manual, but didn’t find the answer there.<br>A short explanation and/or a pointer to more info would be highly appreciated.<br><br>Matthias<br><br>_____________________________________________<br>Von: Zenker, Dr. Matthias <br>Gesendet: Mittwoch, 10. Juli 2013 17:09<br>An: <a href="mailto:gmsh@geuz.org">gmsh@geuz.org</a><br>Cc: Christophe Geuzaine [<a href="mailto:cgeuzaine@ulg.ac.be">cgeuzaine@ulg.ac.be</a>] (<a href="mailto:cgeuzaine@ulg.ac.be">cgeuzaine@ulg.ac.be</a>)<br>Betreff: Anisiotropic mesh in stacked layers<br><br><br>Hi,<br><br>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?<br>How is the mesh width derived from the m11, m22 and m33 fields in MathEvalAniso?<br><br>Thanks for some explanations and hints,<br><br>Matthias<br><br>< Datei: layers.geo >><br><br><br><br>_____________________________________________________________________<br>ERBE Elektromedizin GmbH<br>Firmensitz: 72072 Tuebingen<br>Geschaeftsfuehrer: Christian O. Erbe, Reiner Thede<br>Registergericht: Stuttgart HRB 380137<br><br><layers.geo><br></blockquote><br>-- <br>Prof. Christophe Geuzaine<br>University of Liege, Electrical Engineering and Computer Science <br><a href="http://www.montefiore.ulg.ac.be/~geuzaine">http://www.montefiore.ulg.ac.be/~geuzaine</a><br><br><br><br></blockquote></div><br><div apple-content-edited="true">
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