[Gmsh] Gmsh with physicals

August 26, 2004, 06:53

In the 2.3 version of FOAM, gmshToFoam is supplied, however it can't handle physical boundaries, which is quiet crucial. Are there anyone that are planning to extent the converter to handling this? If so, I would be VERY interested to hear about it!

P.S. In the sourcecode for gmshToFoam it looks like it is under way?!

August 26, 2004, 07:25

Hello Rasmus,

gmshToFoam was a quick&dirty attempt to have a look at the gmsh generated meshes. I tried doing the patch info but then got stuck since I was not clear what they were using for the boundaries.

Am quite willing try fixing that piece of code if you can send me a simple testcase. E.g. can you send me a cube built out of tets with some different physical boundaries?

Mattijs

August 27, 2004, 10:57

I adapted the gmshToFoam converter to use physical regions as patch numbers. Tried it on one case (thanks Rasmus) and it seems to work.

It will be in the next release or contact me directly if you want to try it.

It requires a version 1 format file (whatever that may be - don't ask me about gmsh) and both volume elements (tets/hexes) and surface elements (triangles) present.

Mattijs

January 17, 2005, 12:04

I wrote a simple netgen Neutral file format converter. It will be in the next release or you can contact me if you want it earlier.

Netgen is a pretty good & simple tetrahedral mesh generator which also allows setting of boundary regions.

Mattijs

edvardsen · March 9, 2005, 16:53

Hello
Would it be possible to get the netgen to Foam converter from someone? I run OpenFoam on SuSE Linux 9,2 ?

Best Regards
Lars

mattijs · March 10, 2005, 03:47

Try following post:

http://www.cfd-online.com/cgi-bin/Op...=1245#POST1245

and
- unpack (tar xzf XXX.tgz)
- cd XXX
- wclean
- wmake

Mattijs

david_h · January 27, 2006, 12:57

I made some modifications to the gmshToFoam converter to write out cellZones and faceZones of internal faces. A time consuming function call was also moved out of an inner loop, which seems to reduce the execution time significantly.

I have posted this to the wiki:
http://openfoamwiki.net/index.php/Contrib_gmshToF oamMod

Dave

mattijs · February 2, 2006, 14:11

Hello Dave,

can I put your gmshToFoam mods into the release?

david_h · February 2, 2006, 14:20

Yes you can.

Dave

mattijs · February 2, 2006, 14:36

Could you send a small test case?

Just email it to me directly.

August 26, 2004, 06:53	Gmsh with physicals	#1
Rasmus Gjesing (Gjesing) Guest Posts: n/a	In the 2.3 version of FOAM, gmshToFoam is supplied, however it can't handle physical boundaries, which is quiet crucial. Are there anyone that are planning to extent the converter to handling this? If so, I would be VERY interested to hear about it! P.S. In the sourcecode for gmshToFoam it looks like it is under way?!

August 26, 2004, 07:25	Hello Rasmus, gmshToFoam w	#2
Mattijs Janssens (Mattijs) Guest Posts: n/a	Hello Rasmus, gmshToFoam was a quick&dirty attempt to have a look at the gmsh generated meshes. I tried doing the patch info but then got stuck since I was not clear what they were using for the boundaries. Am quite willing try fixing that piece of code if you can send me a simple testcase. E.g. can you send me a cube built out of tets with some different physical boundaries? Mattijs

August 27, 2004, 10:57	I adapted the gmshToFoam conv	#3
Mattijs Janssens (Mattijs) Guest Posts: n/a	I adapted the gmshToFoam converter to use physical regions as patch numbers. Tried it on one case (thanks Rasmus) and it seems to work. It will be in the next release or contact me directly if you want to try it. It requires a version 1 format file (whatever that may be - don't ask me about gmsh) and both volume elements (tets/hexes) and surface elements (triangles) present. Mattijs

January 17, 2005, 12:04	I wrote a simple netgen Neutr	#4
Mattijs Janssens (Mattijs) Guest Posts: n/a	I wrote a simple netgen Neutral file format converter. It will be in the next release or you can contact me if you want it earlier. Netgen is a pretty good & simple tetrahedral mesh generator which also allows setting of boundary regions. Mattijs

March 9, 2005, 16:53	Hello Would it be possible to	#5
edvardsen New Member Lars Edvardsen Join Date: Mar 2009 Posts: 3 Rep Power: 17	Hello Would it be possible to get the netgen to Foam converter from someone? I run OpenFoam on SuSE Linux 9,2 ? Best Regards Lars

March 10, 2005, 03:47	Try following post: http://	#6
mattijs Senior Member Mattijs Janssens Join Date: Mar 2009 Posts: 1,419 Rep Power: 26	Try following post: http://www.cfd-online.com/cgi-bin/Op...=1245#POST1245 and - unpack (tar xzf XXX.tgz) - cd XXX - wclean - wmake Mattijs

January 27, 2006, 12:57	I made some modifications to t	#7
david_h Member E. David Huckaby Join Date: Mar 2009 Posts: 57 Rep Power: 17	I made some modifications to the gmshToFoam converter to write out cellZones and faceZones of internal faces. A time consuming function call was also moved out of an inner loop, which seems to reduce the execution time significantly. I have posted this to the wiki: http://openfoamwiki.net/index.php/Contrib_gmshToF oamMod Dave

February 2, 2006, 14:11	Hello Dave, can I put your	#8
mattijs Senior Member Mattijs Janssens Join Date: Mar 2009 Posts: 1,419 Rep Power: 26	Hello Dave, can I put your gmshToFoam mods into the release?

February 2, 2006, 14:20	Yes you can. Dave	#9
david_h Member E. David Huckaby Join Date: Mar 2009 Posts: 57 Rep Power: 17	Yes you can. Dave

February 2, 2006, 14:36	Could you send a small test ca	#10
mattijs Senior Member Mattijs Janssens Join Date: Mar 2009 Posts: 1,419 Rep Power: 26	Could you send a small test case? Just email it to me directly.

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