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<p class="MsoNormal"><span style="font-size:11.0pt; font-family:"Calibri","sans-serif"">Hi,</span></p>
<p class="MsoNormal"><span style="font-size:11.0pt; font-family:"Calibri","sans-serif""> </span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt; font-family:"Calibri","sans-serif"">the problem of nonconformal mesh at volume interfaces is still not resolved (see old posts below); the “cut and merge faces” algorithm works only in simple
cases. I would like to know if there is work going on to solve this problem within gmsh. A full solution would have to be able to treat partially overlapping faces of arbitrary shape.</span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt; font-family:"Calibri","sans-serif""> </span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt; font-family:"Calibri","sans-serif"">What is your point of view regarding this problem?</span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt; font-family:"Calibri","sans-serif""> </span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt; font-family:"Calibri","sans-serif"">Thank you,</span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt; font-family:"Calibri","sans-serif""> </span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt; font-family:"Calibri","sans-serif"">Matthias</span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt; font-family:"Calibri","sans-serif""> </span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt; font-family:"Arial","sans-serif"">----------------------------------------------------------------</span><span lang="EN-US">
</span><span lang="EN-US"></span></p>
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<p class="MsoNormal"><b><span style="font-size:10.0pt; font-family:"Tahoma","sans-serif"">Von:</span></b><span style="font-size:10.0pt; font-family:"Tahoma","sans-serif""> Zenker, Dr. Matthias
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<b>Gesendet:</b> Mittwoch, 26. September 2012 13:05<br>
<b>An:</b> 'Jean-François Remacle'<br>
<b>Cc:</b> gmsh@geuz.org<br>
<b>Betreff:</b> AW: [Gmsh] import external-generated geometry in gmsh</span></p>
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<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt; font-family:"Calibri","sans-serif"">Hi,</span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt; font-family:"Calibri","sans-serif""> </span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt; font-family:"Calibri","sans-serif"">the problem of nonconformal mesh at volume interfaces is really annoying.
</span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt; font-family:"Calibri","sans-serif""> </span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt; font-family:"Calibri","sans-serif"">I have tried to find a solution by processing a surface mesh with a scilab script, cutting and merging duplicated interfaces, redefining the volumes and doing
the 3D mesh in gmsh. My tool is not mature yet since the handling of partially overlapping surfaces is not working like it should. But it works for duplicated surfaces which are identical, even in cases when the “cut and merge faces” recently implemented in
gmsh fails.</span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt; font-family:"Calibri","sans-serif""> </span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt; font-family:"Calibri","sans-serif"">Do I understand correctly from the message below (“We can imagine to modify the algorithm and mesh series of connected volumes together.”) that there is a solution
within gmsh in sight? Is there actually work going on at this field?</span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt; font-family:"Calibri","sans-serif""> </span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt; font-family:"Calibri","sans-serif"">If I can contribute to a solution, I would be glad to do so.</span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt; font-family:"Calibri","sans-serif""> </span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt; font-family:"Calibri","sans-serif"">Best regards,</span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt; font-family:"Calibri","sans-serif""> </span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt; font-family:"Calibri","sans-serif"">Matthias</span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt; font-family:"Calibri","sans-serif""> </span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt; font-family:"Calibri","sans-serif""> </span></p>
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<p class="MsoNormal"><b><span style="font-size:10.0pt; font-family:"Tahoma","sans-serif"">Von:</span></b><span style="font-size:10.0pt; font-family:"Tahoma","sans-serif""> Jean-François Remacle [</span><span lang="EN-US" style="font-size:10.0pt; font-family:"Tahoma","sans-serif""><a href="mailto:jean-francois.remacle@uclouvain.be"><span lang="DE">mailto:jean-francois.remacle@uclouvain.be</span></a></span><span style="font-size:10.0pt; font-family:"Tahoma","sans-serif"">]
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<b>Gesendet:</b> Mittwoch, 26. </span><span lang="EN-US" style="font-size:10.0pt; font-family:"Tahoma","sans-serif"">September 2012 11:10<br>
<b>An:</b> </span><span style="font-size:10.0pt; font-family:"Tahoma","sans-serif""><a href="mailto:Stefan.Kremer@Schoeck.de"><span lang="EN-US">Stefan.Kremer@Schoeck.de</span></a></span><span lang="EN-US" style="font-size:10.0pt; font-family:"Tahoma","sans-serif""><br>
<b>Cc:</b> </span><span style="font-size:10.0pt; font-family:"Tahoma","sans-serif""><a href="mailto:gmsh@geuz.org"><span lang="EN-US">gmsh@geuz.org</span></a></span><span lang="EN-US" style="font-size:10.0pt; font-family:"Tahoma","sans-serif""><br>
<b>Betreff:</b> Re: [Gmsh] import external-generated geometry in gmsh</span></p>
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<p class="MsoNormal"><span lang="EN-US"> </span></p>
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<p class="MsoNormal">Le 25 sept. 2012 à 08:59, <a href="mailto:Stefan.Kremer@Schoeck.de">
Stefan.Kremer@Schoeck.de</a> a écrit :</p>
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<p class="MsoNormal" style="margin-bottom:12.0pt"><span style="font-size:10.0pt; font-family:"Arial","sans-serif"">Hello Prof. Geuzaine</span>
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<span style="font-size:10.0pt; font-family:"Arial","sans-serif"">hello Prof. Remacle,</span>
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<span style="font-size:10.0pt; font-family:"Arial","sans-serif"">i have a question to your great tool gmsh:</span>
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<span style="font-size:10.0pt; font-family:"Arial","sans-serif"">Is there any possibility to generate a three-dimensional geometry (with several domains (=different materials) with an external software</span>
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<span style="font-size:10.0pt; font-family:"Arial","sans-serif"">then import and mesh it with gmsh?</span>
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<p class="MsoNormal">Yes : we handle STEP, BREP and IGES inputs.</p>
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<p class="MsoNormal" style="margin-bottom:12.0pt"> </p>
<p class="MsoNormal" style="margin-bottom:12.0pt"><span style="font-size:10.0pt; font-family:"Arial","sans-serif"">I have tried this with freeCAD and exported a brep-file of my geometry but the problem is that common faces of volume bodies in the geometry</span>
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<span style="font-size:10.0pt; font-family:"Arial","sans-serif"">was saved twice (each belongs to one domain) and so the gmsh' mesh-algorithmus was not able to mesh the domains correctly.</span>
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<p class="MsoNormal">It is possible that freecad outputs volumes that have one face in common and that face is duplicated. In this case, our basic 3D mesh</p>
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<p class="MsoNormal">actually fails because all volumes are meshed together and this particular situation generates duplicated points. We can imagine to</p>
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<p class="MsoNormal">modify the algorithm and mesh series of connected volumes together. Another way is to save volumes separately with freecad, mesh</p>
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<p class="MsoNormal">them and merge meshes.</p>
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<p class="MsoNormal" style="margin-bottom:12.0pt"> </p>
<p class="MsoNormal"><span style="font-size:10.0pt; font-family:"Arial","sans-serif"">Maybe there is another way, generating a 3D-geometry (should be scriptable) and match the domains with material properties so that getdp could solve the problem.</span>
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<br>
<span style="font-size:10.0pt; font-family:"Arial","sans-serif"">Do you have any ideas or hints?</span>
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<br>
<span style="font-size:10.0pt; font-family:"Arial","sans-serif"">Thanks in advance for your help</span>
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<span style="font-size:10.0pt; font-family:"Arial","sans-serif"">Best regards from south-germany</span>
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<span style="font-size:10.0pt; font-family:"Arial","sans-serif"">Stefan Kremer</span>
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<span style="font-size:10.0pt; font-family:"Arial","sans-serif"">Dipl.-Phys. Stefan Kremer</span>
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<p class="MsoNormal"><span class="apple-style-span"><span style="font-size:9.0pt; font-family:"Helvetica","sans-serif"; color:black">Prof. Jean-Francois Remacle</span></span><span style="font-size:13.5pt; font-family:"Helvetica","sans-serif"; color:black"></span></p>
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