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[Gmsh] Cell to node connectivity after 'gmshToFoam'

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Old   May 1, 2015, 07:11
Default Cell to node connectivity after 'gmshToFoam'
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Jibran
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Hello Foamers,

Objective:
I am interested in obtaining the cell to node connectivity in a particular order for my mesh.

Description:
I use gmsh to create my mesh and I can see from the .msh file that the cell to node connectivity is in the order as specified by the gmsh manual (which I need). However when I run 'gmshToFoam testCase.msh' that order is disturbed if I check the cell to node connectivity through 'mesh.cellPoints()'. Now the connectivity is not in any particular order as shown below.

Results:
1. Connectivity before gmshToFoam (from .msh file):
Cell 0 --> ( 0 4 20 19 36 38 56 55 )
Cell 1 --> ( 19 20 21 18 55 56 57 54 )

2. Connectivity after gmshToFoam (from mesh.cellPoints()):
Cell 0 --> ( 0 4 19 20 36 38 55 56 )
Cell 1 --> ( 18 19 20 21 54 55 56 57 )

As can be seen from the text in red the ordering is changed. I also tried 'gmshToFoam -keepOrientation testCase.msh' but it gave the same result. Any help in this regard will be appreciated. Thanks!

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Last edited by Jibran; May 3, 2015 at 10:23.
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Old   June 8, 2015, 09:09
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Jibran
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Dear All,

I am still not able to figure out how it works. Any hints?

Regards
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