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June 13, 2013, 18:12 |
Problem in gmsh
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#1 |
Member
Dinesh Balaji
Join Date: Oct 2012
Posts: 43
Rep Power: 13 |
Hi,
I am trying to convert the gmesh file to foam file. But i am getting the following statement. --> FOAM Warning : Not using gmsh face 4(154822 28524 28525 154823) since zero vertex is not on boundary of polyMesh Can someone tell, how to correct it? |
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June 15, 2013, 11:31 |
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#2 |
Retired Super Moderator
Bruno Santos
Join Date: Mar 2009
Location: Lisbon, Portugal
Posts: 10,975
Blog Entries: 45
Rep Power: 128 |
Greetings Dinesh,
According to the warning message, it looks like there is a face on the original mesh that is not on the boundary mesh (i.e. surface mesh). It's possible that you have a zero-thickness cell somewhere in your mesh and OpenFOAM does not like that. Best regards, Bruno
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June 16, 2013, 15:12 |
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#3 |
Member
Dinesh Balaji
Join Date: Oct 2012
Posts: 43
Rep Power: 13 |
Hi bruno,
Thanks for responding. Is there some way to check the zero thickness spot and rectify it? |
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June 16, 2013, 15:17 |
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#4 | |
Retired Super Moderator
Bruno Santos
Join Date: Mar 2009
Location: Lisbon, Portugal
Posts: 10,975
Blog Entries: 45
Rep Power: 128 |
Hi Dinesh,
Doesn't Gmsh have a mesh inspection capability? Try reloading the mesh in Gmsh and search for the point IDs in the list you've gotten: Quote:
Bruno
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June 16, 2013, 15:28 |
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#5 |
Member
Dinesh Balaji
Join Date: Oct 2012
Posts: 43
Rep Power: 13 |
hi bruno,
Thanks again. But there are two problems. 1. this is just a one warning of nearly 115 warnings I got. So instead of locating the cells, is it better to do something before meshing ? 2. should i modify something in the geo file or should I do something else in the gmesh window? |
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June 16, 2013, 15:32 |
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#6 |
Retired Super Moderator
Bruno Santos
Join Date: Mar 2009
Location: Lisbon, Portugal
Posts: 10,975
Blog Entries: 45
Rep Power: 128 |
Hi Dinesh,
I'm not very familiar with how Gmsh works, but I would suggest that you check the first warning, at least to get an idea of what the problem might be. Because after that problem is solved, it might solve all of the others or some of them. Have you checked what Gmsh tells you about the mesh you have? Does it give any warnings on its own? Best regards, Bruno
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June 16, 2013, 15:36 |
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#7 |
Member
Dinesh Balaji
Join Date: Oct 2012
Posts: 43
Rep Power: 13 |
No. The gmesh works perfectly fine. after I converted it to foam file, I checked the mesh and it says mesh ok.
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June 16, 2013, 15:40 |
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#8 |
Retired Super Moderator
Bruno Santos
Join Date: Mar 2009
Location: Lisbon, Portugal
Posts: 10,975
Blog Entries: 45
Rep Power: 128 |
What does the full OpenFOAM checkMesh give you?
Code:
checkMesh -allTopology -allGeometry -constant Because if there is no difference between the two, then I guess the warning can be ignored?!
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June 16, 2013, 15:47 |
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#9 |
Member
Dinesh Balaji
Join Date: Oct 2012
Posts: 43
Rep Power: 13 |
Hi,
Thanks. Will try that and let u know. |
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