[Gmsh] Error with intersecting facets STL file in gmsh

[David Colignon]

On 22/07/10 1:41, Harsh Menon wrote:

> I have a solidworks model which I exported as an STL file. Then I used the following test.geo
>
> Geometry.Tolerance = 1.e-12;
> MeshSize = 0.1 ;
>
> Merge "refined.stl" ;
>
> Point(1) = {-1.0,-1.0,-1.2, MeshSize};
> Point(2) = { 1.4,-1.0,-1.2, MeshSize};
> Point(3) = { 1.4, 1.4,-1.2, MeshSize};
> Point(4) = {-1.0, 1.4,-1.2, MeshSize};
>
> Line(1) = {1 , 2};
> Line(2) = {2 , 3};
> Line(3) = {3 , 4};
> Line(4) = {4 , 1};
>
>
> Line Loop(1) = {1, 2, 3, 4};
> Plane Surface(2) = {1};
>
> Extrude{0, 0, 2.432}{ Surface{2}; }
>
> Surface Loop(1) = {1};
> Surface Loop(2) = { 2, 13, 17, 21, 25, 26};
>
> Volume(2) = {2,1};
>
> Physical Volume("Fluid") = {2};
>
> Physical Surface("Man ") = {1};
> Physical Surface("Floor") = {2};
> Physical Surface("Roof") = {17};
> Physical Surface("Inlet") = {13};
> Physical Surface("Outlet") = {21};
> Physical Surface("Walls") = {25, 26};
>
> When i do
>
> gmsh -3 test.geo
>
> I get the following error
>
> Error:  Invalid PLC.
>    Hint:  Use -d switch to check it.
> Error   : Self intersecting surface mesh, computing intersections (this could take a while)
> Constructing Delaunay tetrahedralization.
>    Creating initial tetrahedralization.
>    Incrementally inserting points.
>
> I see that I have intersecting facets but is there any thing i can do to fix it? (either a switch in gmsh or something i
> should do in solidworks)


Hi,

you should modify your model in solidworks so that you don't have intersecting surfaces...

Regards,

Dave

--
David Colignon, Ph.D.
Collaborateur Logistique du F.R.S.-FNRS
CÉCI - Consortium des Équipements de Calcul Intensif
ACE - Applied & Computational Electromagnetics
Institut Montefiore B28
Université de Liège
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> Thanks!
>
>
>
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