[Gmsh] Windows, Ubuntu give different meshes

[moritz braun]

Dear Christophe

I assume  identical  geometries leading to different meshes
between different versions of  redhat 7.4 to 7.6
can be expected.
I was quite surprised because my self consitent code behaved differently
depending
on the redhat version and now I understand!

Regards

Moritz


On Fri, Jun 28, 2019 at 8:04 AM Christophe Geuzaine <cgeuzaine at uliege.be>
wrote:

>
>
> > On 27 Jun 2019, at 03:33, Gib Bogle <g.bogle at auckland.ac.nz> wrote:
> >
> > I have been testing with the demo file cube.geo:
> >
> > lc = 0.3;
> > Point(1) = {0.0,0.0,0.0,lc};
> > Point(2) = {1,0.0,0.0,lc};
> > Point(3) = {1,1,0.0,lc};
> > Point(4) = {0,1,0.0,lc};
> > Line(1) = {4,3};
> > Line(2) = {3,2};
> > Line(3) = {2,1};
> > Line(4) = {1,4};
> > Line Loop(5) = {2,3,4,1};
> > Plane Surface(6) = {5};
> > tmp[] = Extrude {0,0.0,1} {
> >   Surface{6};
> > };
> > Physical Volume(1) = tmp[1];
> >
> > I generate the mesh file at the command line like this:
> >
> > gmsh -3 cube.geo
> >
> > on a Windows 7 machine and on Ubuntu 16.04.  The gmsh version is 4.3.0.
> >
> > 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.
> >
> > Should I be concerned about this?
>
> No, on the same machine the meshes should be identical, but across OSes
> (and different compilers) small variations are normal.
>
> Christophe
>
>
> >
> > Thanks
> > Gib
> > _______________________________________________
> > gmsh mailing list
> > gmsh at onelab.info
> > http://onelab.info/mailman/listinfo/gmsh
>
> —
> Prof. Christophe Geuzaine
> University of Liege, Electrical Engineering and Computer Science
> http://www.montefiore.ulg.ac.be/~geuzaine
>
>
>
>
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>


-- 
Prof M Braun         Tel.:27-12-4298006/8027
Physics Department  Fax.: 27-12-4293643
University of South Africa (UNISA)
moritz.braun at gmail.com
P.O. Box 392
0003
UNISA
 South Africa
http://moritz-braun.blogspot.com
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