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<p>Thank you for your answer. Let me know if I understood well: I
have two option, the first one is to change the order of the
corners in the transfinite volume definition to have the match and
the second one is to create the bulk cube using extrusion? <br>
</p>
<p>I'm not sure to understand perfectly how transfinite could be
replaced by extrusion. Is there is a way to have regular elements
in the bulk of the volume with this method? <br>
</p>
Best regards, <br>
<br>
--<br>
<br>
Quentin Goestchel <br>
<br>
<div class="moz-cite-prefix">Le 30/05/2018 à 22:10, Christophe
Geuzaine a écrit :<br>
</div>
<blockquote type="cite"
cite="mid:618F87E0-7E5B-456B-9F0D-CA255EEEC842@uliege.be">
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<br class="">
<div><br class="">
<blockquote type="cite" class="">
<div class="">On 25 May 2018, at 16:26, Quentin Goestchel <<a
href="mailto:quentin.goestchel@ens-cachan.fr" class=""
moz-do-not-send="true">quentin.goestchel@ens-cachan.fr</a>>
wrote:</div>
<br class="Apple-interchange-newline">
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charset=utf-8" class="">
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<p class="">Dear Sir or Madam,</p>
<p class=""> I would like to thank you for the great work
which has been done to develop the open-source Gmsh
software. <br class="">
</p>
<p class="">I am currently working on a 3D numerical
method and I think I have found a bug in the 3D meshing
algorithm. I was trying to generate a transfinite bulk
in a mesh (to have a constant orthogonality of the
elements), and an unstructured layer around it, as shown
in the enclosed "sphereTransfinite.png". <br class="">
</p>
</div>
</div>
</blockquote>
<div><br class="">
</div>
<div>This is "normal" the (non-recombined) 3D transfinite
algorithm does not try to enforce the compatibility between
the volume and surface meshes. It's actually impossible
without modifying the 2D mesh a posteriori in some
configuration (since we also generate the 2D mesh first). You
should specify the corners of the transfinite interpolation in
the right order to have the match.</div>
<div><br class="">
</div>
<div>PS: Using Extrusion instead of Transfinite, Gmsh will try
to perform the modifications automatically.</div>
<br class="">
<blockquote type="cite" class="">
<div class="">
<div text="#000000" bgcolor="#FFFFFF" class="">
<p class=""> </p>
<p class="">Everything was going fine until I noticed a
big error on my discretized spherical surface, computed
with the sum of the areas of the boundary faces. I found
out that my code was unable to find the neighbours of
many tetrahedrons around the bulk mesh because many
faces were not matching but crossing each other edges,
as shown in sphereTransfinite_err.png . <br class="">
</p>
<p class="">I didn't find any topics about such problem so
I assume that you didn't know about it, but I might be
wrong. <br class="">
</p>
<p class="">Best regards, <br class="">
</p>
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<td style="color: #00778b; font-size:
9pt;" class="" align="left"> <span
style="font-size: 12pt;" class="">Quentin
Goestchel</span> <span class="nd"
style="font-size: 17px;"> | </span><span
class="nl"><i class="">Etudiant -
Année ARPE </i></span> <br
class="nd">
Département Génie Civil <br class="">
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class="" moz-do-not-send="true">+33(0)6
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style="color:
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class="" moz-do-not-send="true"><span
style="color: #00778b;white-space:
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class="">@</span>ens-paris-saclay<span
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<span id="cid:73485356-7987-4870-88A0-75851CAA9770@home"><sphereTransfinite.png></span><span
id="cid:D0F9A114-3082-4C96-983E-5226B0D70FC2@home"><sphereTransfinite_err.png></span><span
id="cid:2D9AFF67-924E-47A8-ABB3-E17A1DC4C7B5@home"><sphereTransfinite.geo></span>_______________________________________________<br
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white-space: normal; word-spacing: 0px;
-webkit-text-stroke-width: 0px;">Prof. Christophe Geuzaine<br
class="">
University of Liege, Electrical Engineering and Computer
Science <br class="">
<a href="http://www.montefiore.ulg.ac.be/%7Egeuzaine"
class="" moz-do-not-send="true">http://www.montefiore.ulg.ac.be/~geuzaine</a><br
class="">
<br class="">
Free
software: <a class="moz-txt-link-freetext" href="http://gmsh.info">http://gmsh.info</a> | <a class="moz-txt-link-freetext" href="http://getdp.info">http://getdp.info</a> | <a class="moz-txt-link-freetext" href="http://onelab.info">http://onelab.info</a></div>
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<span style="font-size: 12pt;" class="">Quentin
Goestchel</span>
<span class="nd" style="font-size: 17px;"> | </span><span
class="nl"><i class="">Etudiant - Année ARPE </i></span>
<br class="nd">
Département Génie Civil <br class="">
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#00778b;text-decoration: none;" class="">+33(0)6
83 75 57 53</a>
<span class="nd" style="font-size: 11pt;"> | </span>
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style="color: #00778b;text-decoration: none;"
class=""><span style="color:
#00778b;white-space: nowrap;" class="">quentin.goestchel<span
class="">@</span>ens-paris-saclay<span
class="">.</span>fr</span></a>
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