[Gmsh] GmshToFoam Error

[Max Orok]

Hi Nick,

gmshToFoam is an OpenFOAM community tool and not supported by the Gmsh
team.
That said, have you tried setting Mesh.MshFileVersion=2.2 in your geo file?

There was a somewhat recent mesh major version change from 2 to 4, perhaps
your mesh is version 4?
There are some old issues that might be helpful:

https://gitlab.onelab.info/gmsh/gmsh/issues/687
https://gitlab.onelab.info/gmsh/gmsh/issues/672

Sincerely,
Max

On Thu, Feb 13, 2020 at 10:48 AM Nick Barra <nb17010 at bristol.ac.uk> wrote:

> Hi,
>
>
>
> I am trying to model an aerofoil by creating a hybrid mesh in Gmsh and
> solving it in OpenFoam. When I try to run the ‘gmshToFoam’ converter I get
> warnings which are then presented as errors when using checkMesh. I have
> copied the first few error lines below:
>
>
>
> FOAM Warning
> :
>
>
> From function Foam::polyMesh::polyMesh(const Foam::IOobject&,
> Foam::pointField&&, const cellShapeList&, const faceListList&, const
> wordList&, const wordList&, const Foam::word&, const Foam::word&, const
> wordList&,
> bool)
>                                                                                                                          in
> file meshes/polyMesh/polyMeshFromShapeMesh.C at line
> 592
>                                                                             Found
> 3653 undefined faces in mesh; adding to default
> patch.
>                            Finding faces of patch
> 0
>
>
> Finding faces of patch
> 1
>
>
> --> FOAM Warning : Not using gmsh face 4(4 414 446 16) since zero vertex
> is not on boundary of
> polyMesh
> --> FOAM Warning
> :
>
>
> From function int main(int,
> char**)
>
>
> in file gmshToFoam.C at line
> 1549
>                  Could not match gmsh face 4(4 414 446 16) to any of the
> interior or exterior faces that share the same 0th
> point
> --> FOAM Warning : Not using gmsh face 4(414 415 447 446) since zero vertex
> is not on boundary of
> polyMesh
> --> FOAM Warning
> :
>
>
> From function int main(int,
> char**)
>
>
> in file gmshToFoam.C at line
> 1549
>                                                 Could not match gmsh face
> 4(414 415 447 446) to any of the interior or exterior faces that share the
> same 0th point
>
>
>
>
>
> This error then repeats several times, and then it seems to successfully
> find faces for the rest of the patches.
>
> The checkMesh error is ‘Unused points found in the mesh, number unused
> faces:...’
>
>
>
> My geometry file is attached to this email.
>
>
>
> Kind Regards,
>
> Nick
>
>
> _______________________________________________
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> gmsh at onelab.info
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>


-- 
Max Orok
Contractor
www.mevex.com
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