<div dir="ltr"><div>Dear Christophe</div><div><br></div><div>I assume identical geometries leading to different meshes</div><div>between different versions of redhat 7.4 to 7.6 <br></div><div>can be expected. <br></div><div>I was quite surprised because my self consitent code behaved differently depending</div><div>on the redhat version and now I understand!</div><div><br></div><div>Regards</div><div><br></div><div>Moritz <br></div><div><br></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Fri, Jun 28, 2019 at 8:04 AM Christophe Geuzaine <<a href="mailto:cgeuzaine@uliege.be">cgeuzaine@uliege.be</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><br>
<br>
> On 27 Jun 2019, at 03:33, Gib Bogle <<a href="mailto:g.bogle@auckland.ac.nz" target="_blank">g.bogle@auckland.ac.nz</a>> wrote:<br>
> <br>
> I have been testing with the demo file cube.geo:<br>
> <br>
> lc = 0.3;<br>
> Point(1) = {0.0,0.0,0.0,lc};<br>
> Point(2) = {1,0.0,0.0,lc};<br>
> Point(3) = {1,1,0.0,lc};<br>
> Point(4) = {0,1,0.0,lc};<br>
> Line(1) = {4,3};<br>
> Line(2) = {3,2};<br>
> Line(3) = {2,1};<br>
> Line(4) = {1,4};<br>
> Line Loop(5) = {2,3,4,1};<br>
> Plane Surface(6) = {5};<br>
> tmp[] = Extrude {0,0.0,1} {<br>
> Surface{6};<br>
> };<br>
> Physical Volume(1) = tmp[1];<br>
> <br>
> I generate the mesh file at the command line like this:<br>
> <br>
> gmsh -3 cube.geo<br>
> <br>
> on a Windows 7 machine and on Ubuntu 16.04. The gmsh version is 4.3.0.<br>
> <br>
> I find that the meshes created on the two systems are a bit different. On Windows the mesh has 137 nodes and 372 elements, while on Ubuntu it has 136 nodes and 373 elements.<br>
> <br>
> Should I be concerned about this?<br>
<br>
No, on the same machine the meshes should be identical, but across OSes (and different compilers) small variations are normal.<br>
<br>
Christophe<br>
<br>
<br>
> <br>
> Thanks<br>
> Gib<br>
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<br>
— <br>
Prof. Christophe Geuzaine<br>
University of Liege, Electrical Engineering and Computer Science <br>
<a href="http://www.montefiore.ulg.ac.be/~geuzaine" rel="noreferrer" target="_blank">http://www.montefiore.ulg.ac.be/~geuzaine</a><br>
<br>
<br>
<br>
<br>
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</blockquote></div><br clear="all"><br>-- <br><div dir="ltr" class="gmail_signature">Prof M Braun Tel.:27-12-4298006/8027<br>Physics Department Fax.: 27-12-4293643<br>University of South Africa (UNISA) <br><a href="mailto:moritz.braun@gmail.com" target="_blank">moritz.braun@gmail.com</a><br>P.O. Box 392 <br>0003 <br>UNISA<br> South Africa <br><a href="http://moritz-braun.blogspot.com" target="_blank">http://moritz-braun.blogspot.com</a><br></div>