> On 17 Jul 2016, at 14:35, Martin Kraska <[email protected]>
> wrote:
>
> Hi Christophe,
>
> Thanks for the hint. I can indeed create a mesh with compound surfaces in
> 2.13.1. I observed some restrictions:
>
> - the midside nodes of the generated elements don't follow the compound
> surface (except on the edges of the surface).
> - Successful meshing relies on introduction of an upper element size limit
> - If I also combine the adjacent lines in order to get rid of the short edges
> (they still attract small elements), then 3D meshing fails.
>
With the current compound implementation you will also need to define the
surfaces that touch a compound line as compound. Here's the corrected script:
Merge "part.step";
// Mesh control
Mesh.ElementOrder=2;
Mesh.CharacteristicLengthMax=10;
Mesh.Optimize=1;
// Display control
Mesh.SurfaceEdges = 1;
Mesh.SurfaceFaces = 0;
Mesh.VolumeEdges = 1;
Mesh.VolumeFaces = 0;
Compound Line(1000)={63,64};
Compound Line(1001)={65,66};
Compound Surface(30) = {23,25};
Compound Surface(31) = {9,24,26};
Compound Surface(32) = {21};
Compound Surface(33) = {22};
Mesh 3;
Physical Surface("support") = {5};
Physical Surface("load") = {17};
Physical Volume("part") = {1};
Mesh.SaveGroupsOfNodes = 1;
Save "gmsh.inp";
> The console complains about intersecting surfaces.
>
> Also, switching on all geometry healing options and setting a high geometry
> tolerance does not remove the small edges.
>
> Martin
>
>>
>> 1. Re: Gmsh crash (Christophe Geuzaine)
>>
>>
>> ----------------------------------------------------------------------
>>
>> Message: 1
>> Date: Sat, 16 Jul 2016 22:44:23 +0200
>> From: Christophe Geuzaine <[email protected]>
>> To: [email protected]
>> Subject: Re: [Gmsh] Gmsh crash
>> Message-ID: <[email protected]>
>> Content-Type: text/plain; charset=us-ascii
>>
>>
>> Hi Martin,
>>
>> Give 2.13.1 a try: the issue is that compounds cannot currently be meshed
>> high-order (this will be supported with the new compound implementation in
>> Gmsh
>> 3.0); also, the error message was misleading.
>>
>> Christophe
>>
> <part.geo><part.step>_______________________________________________
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--
Prof. Christophe Geuzaine
University of Liege, Electrical Engineering and Computer Science
http://www.montefiore.ulg.ac.be/~geuzaine
Tetrahedron V, July 4-5 2016: http://tetrahedron.montefiore.ulg.ac.be
Free software: http://gmsh.info | http://getdp.info | http://onelab.info
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