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[Technical] Using FluentMesh instead of AnsysFluentMesh for fluent3DMeshToFoam command

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Old   December 12, 2020, 03:27
Default Using FluentMesh instead of AnsysFluentMesh for fluent3DMeshToFoam command
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Farzad Faraji
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Dear fiends
As you know in we have two different tools for meshing in Ansys workbench;
1- AnsysFluentMesh(for automatic tetrahedral mesh)
2- FluentMesh (for automatic polyhedral and polyhedral-hexcore mesh)

I have used AnsysFluentMesh tool previously and I easily import(.msh) my mesh to openfoam. Now, I need to use FluentMesh for generating polyhedron-hexcore mesh and I export .msh file, but when I want to import it to openfoam, it give me error;

Code:
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
Create time

Dimension of grid: 3
Number of points: 55755
--> FOAM Warning : Found unknown block of type: "11"
    on line 17
Number of faces: 603915
Number of cells: 296366
PointGroup: 6 start: 0 end: 475.  Reading points...done.
PointGroup: 18 start: 476 end: 11660.  Reading points...done.
PointGroup: 114 start: 11661 end: 55754.  Reading points...done.
--> FOAM Warning : Found unknown block of type: "11"
    on line 55781
FaceGroup: 8 start: 0 end: 22365.  Reading uniform faces...done.
FaceGroup: 113 start: 22366 end: 603914.  Reading uniform faces...done.
CellGroup: 111 start: 0 end: 296365 type: 1
--> FOAM Warning : Found unknown block of type: "316"
    on line 660183
--> FOAM Warning : Found unknown block of type: "71"
    on line 660662
--> FOAM Warning : Found unknown block of type: "71"
    on line 664556
--> FOAM Warning : Found unknown block of type: "71"
    on line 668446
--> FOAM Warning : Found unknown block of type: "71"
    on line 672340
--> FOAM Warning : Found unknown block of type: "71"
    on line 676234
--> FOAM Warning : Found unknown block of type: "71"
    on line 680124
Zone: 111 name: solid type: fluid.  Reading zone data...done.
Zone: 113 name: interior--solid type: interior.  Reading zone data...done.
Zone: 8 name: wall type: wall.  Reading zone data...done.
Zone: 7 name: wall:feature.7 type: boundary-edge.  Reading zone data...done.


--> FOAM FATAL ERROR: 
Do not understand characters: [
    on line 684058

    From function virtual int yyFlexLexer::yylex()
    in file fluent3DMeshToFoam.L at line 747.

FOAM exiting
Do you know any solution for this problem? By the way, I used tetrahedral mesh for a simple cube and it gives me this error again, so it is not related to type of the mesh, and it is related to software or the way I mesh it.


Thanks,
Farzad
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Old   March 3, 2021, 01:22
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Kyfrankie
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I am also facing the same issue. I am curious is there any update?
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Old   June 3, 2023, 12:10
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Hello Farzad,

Did you find a solution to this problem?

I managed to fix it by removing the '[' manually from the mesh file since it wasn't something that affected the mesh. However, when I do the conversion I get the following warning: Found unknown block of type: "11"
Did you ever come across anything like this?`

Best,

Amir
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Old   October 30, 2023, 12:15
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Nilotpal Dhar
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It might because of the polyhedral cells

Edit: I have exported the mesh as .cas legacy file, unzipped it and converted to OF mesh which got rid of FOAM Warning : Found unknown block of type: "11" warning

Last edited by ndhar; November 1, 2023 at 09:30.
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Old   November 2, 2023, 11:27
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Saeed Jamshidi
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Please read this thread:

ANSYS Fluent Polyhedral mesh to OpenFOAM

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