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-   OpenFOAM Native Meshers: blockMesh (http://www.cfd-online.com/Forums/openfoam-meshing-blockmesh/)
-   -   BlockMesh error (http://www.cfd-online.com/Forums/openfoam-meshing-blockmesh/61854-blockmesh-error.html)

hjasak April 13, 2006 15:59

So far, you've got a bunch of
 
So far, you've got a bunch of points, but only one block:

hex (0 1 2 3 4 5 6 7)
(50 50 1)
simpleGrading (1 1 1)


Since the block only uses points 0-7, it is clear that face 4(0 16 17 3) does not have a block it belongs to, which is as error.

Which part of the error message don't you understand?

Hrv

shellbell1999 April 13, 2006 16:10

It's hard for me to explain wh
 
It's hard for me to explain what i want the mesh to look like but basically its a cube and points 16 and 17 lie on the left wall of the cube. The block I defined is the entire cube and I assumed that in defining this since 16 and 17 were on the cube it would be alright. So I'm guessing this isn't true?

And the main part of the error is:
--> FOAM FATAL ERROR : face 0 in patch 0 does not have neighbour cell face: 4(0 16 17 3)

what is a cell face?

Thanks

hjasak April 13, 2006 16:24

Not true - read the section in
 
Not true - read the section in the manual about mesh generation. You will need to define more than one block, or create one block and then re-patch the boundaries to grab the face you want to catch. Currently, blockMesh only allows you to grab the whole side of a block to define a boundary patch.

Try thinking about how the code is supposed to do its job: the only way to "find out" that your points ar on the surface would be through floating point comparisons, which would be very very bad indeed.

Hrv

shellbell1999 April 13, 2006 16:29

Ahhh I did not know that. Than
 
Ahhh I did not know that. Thank you very much. I'll try that

Shelley

shellbell1999 April 19, 2006 09:36

Oops nevermind. Apparently I j
 
Oops nevermind. Apparently I just couldn't see that extra parenthases.

curiosity August 24, 2012 07:22

Another causes for the same message error?
 
Hi,

Ive made a geometry and Ive got the same error:

FOAM FATAL ERROR:
face0 in patch 11 does not have neighbour cell face: 8(160 161 162 163 164 165 166 167)

The question is, I know the order to name the vertices in a block and Ive reviewed all my vertices and blocks... Could it be another cause to this message error?

The face0 of the cell is next to a part of another bigger cell... Could it be the problem?

Thanks!


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