[kingmaker]

Hello

I recently came across this polyDualMesh which can convert tet mesh from snappyHexMesh to polygonal mesh. I am trying to get this function working but, I have this problem every time :

--> FOAM FATAL ERROR: 
Created illegal face 2(4472123 4472125) at position:16171367 when filtering removed points

    From function polyTopoChange::compact(..)
    in file polyTopoChange/polyTopoChange/polyTopoChange.C at line 1056.

FOAM aborting

#0  Foam::error::printStack(Foam::Ostream&) addr2line failed
#1  Foam::error::abort() addr2line failed

I used this command :: nice -n 10 polyDualMesh 40

Can any one suggest me or explain me why I am getting this error... ? I am trying to mesh a blower. I have successfully completed meshing it with SnappyHex. there are some highly skewed faces may be 2 or 3 our of 17Million faces.

Please help me clear this error.

Thanks in advance.

[Thom]

I've just come across exactly the same error and would be interested if you or anyone else has found a solution.

Cheers,
Thom

[vonboett]

I wonder, too, the same can happen with stitchMesh...

[wyldckat]

Greetings to all!

Originally Posted by kingmaker

there are some highly skewed faces may be 2 or 3 our of 17Million faces.

Once your mesh has flaws in it, it's very hard to do anything else to the mesh, unless it's some operation to fix it.
But so far, I have not yet been successful in doing this myself. Although there are two OpenFOAM utilities that might help:

• modifyMesh
• collapseEdges
  

The other thing you can try is to scale the mesh by 1000 times, by using transformPoints. This would affect how the mesh check algorithms work, at least those that use direct comparison of positions.

Originally Posted by vonboett

I wonder, too, the same can happen with stitchMesh...

With stitchMesh, things can be rather different. More information about the mesh where you are having this problem would come in handy.

Best regards,
Bruno

[vonboett]

Thanks Bruno, I didn't know about modifyMesh. I increased in my case the resolution of the coarser mesh part such that the cell width at the patches for stitch mesh get the ratio 2:1, and it worked fine.

Best wishes,

Albrecht