CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > Software User Forums > OpenFOAM

Illegal cell label -1, fluent3DMeshToFoam

Register Blogs Members List Search Today's Posts Mark Forums Read

Like Tree1Likes
  • 1 Post By cweisheng

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   November 17, 2021, 10:47
Default Illegal cell label -1, fluent3DMeshToFoam
  #1
New Member
 
Ben Gherardi
Join Date: Jun 2016
Posts: 17
Rep Power: 10
BenGher is on a distinguished road
Hello foamers,

I am trying to convert a mesh from fluent to openfoam, and I am blocked at the following error:
Code:
Create time

Dimension of grid: 3
Number of points: 6926048
Number of faces: 12597122
Number of cells: 3106054
PointGroup: 11562 start: 0 end: 42135.  Reading points...done.
PointGroup: 18 start: 42136 end: 42365.  Reading points...done.
PointGroup: 29 start: 42366 end: 42387.  Reading points...done.
PointGroup: 31 start: 42388 end: 42409.  Reading points...done.
PointGroup: 33 start: 42410 end: 42429.  Reading points...done.
PointGroup: 35 start: 42430 end: 42451.  Reading points...done.
PointGroup: 37 start: 42452 end: 42471.  Reading points...done.
PointGroup: 39 start: 42472 end: 42493.  Reading points...done.
PointGroup: 55 start: 42494 end: 43408.  Reading points...done.
PointGroup: 75 start: 43409 end: 44884.  Reading points...done.
PointGroup: 95 start: 44885 end: 45538.  Reading points...done.
PointGroup: 103 start: 45539 end: 45687.  Reading points...done.
PointGroup: 11624 start: 45688 end: 310456.  Reading points...done.
PointGroup: 11633 start: 881799 end: 6926047.  Reading points...done.
PointGroup: 11640 start: 310457 end: 319728.  Reading points...done.
PointGroup: 11897 start: 319729 end: 881798.  Reading points...done.
FaceGroup: 11597 start: 0 end: 275917.  Reading mixed faces...done.
FaceGroup: 11572 start: 275918 end: 277552.  Reading mixed faces...done.
FaceGroup: 11571 start: 277553 end: 279196.  Reading mixed faces...done.
FaceGroup: 11570 start: 279197 end: 280584.  Reading mixed faces...done.
FaceGroup: 11569 start: 280585 end: 282229.  Reading mixed faces...done.
FaceGroup: 11568 start: 282230 end: 283974.  Reading mixed faces...done.
FaceGroup: 11567 start: 283975 end: 285625.  Reading mixed faces...done.
FaceGroup: 11631 start: 376428 end: 12597121.  Reading mixed faces...done.
FaceGroup: 98 start: 285626 end: 286929.  Reading uniform faces...done.
FaceGroup: 78 start: 286930 end: 289877.  Reading uniform faces...done.
FaceGroup: 58 start: 289878 end: 291703.  Reading uniform faces...done.
FaceGroup: 27 start: 291704 end: 291771.  Reading uniform faces...done.
FaceGroup: 26 start: 291772 end: 291853.  Reading uniform faces...done.
FaceGroup: 25 start: 291854 end: 291921.  Reading uniform faces...done.
FaceGroup: 24 start: 291922 end: 291999.  Reading uniform faces...done.
FaceGroup: 23 start: 292000 end: 292081.  Reading uniform faces...done.
FaceGroup: 21 start: 292082 end: 292159.  Reading uniform faces...done.
FaceGroup: 2 start: 292160 end: 376427.  Reading uniform faces...done.
CellGroup: 11629 start: 0 end: 3106053 type: 1
--> FOAM Warning : Found unknown block of type: "71"
    on line 19523259
--> FOAM Warning : Found unknown block of type: "71"
    on line 19788032
--> FOAM Warning : Found unknown block of type: "71"
    on line 19789687
--> FOAM Warning : Found unknown block of type: "71"
    on line 19791436
--> FOAM Warning : Found unknown block of type: "71"
    on line 19793085
--> FOAM Warning : Found unknown block of type: "71"
    on line 19794477
--> FOAM Warning : Found unknown block of type: "71"
    on line 19796125
--> FOAM Warning : Found unknown block of type: "71"
    on line 19797764
Zone: 11629 name: fluid-region-1 type: fluid.  Reading zone data...done.
Zone: 2 name: origin-glider type: wall.  Reading zone data...done.
Zone: 21 name: origin-tunnel-zmax type: wall.  Reading zone data...done.
Zone: 23 name: origin-tunnel-zmin type: wall.  Reading zone data...done.
Zone: 24 name: origin-tunnel-ymax type: wall.  Reading zone data...done.
Zone: 25 name: origin-tunnel-xmin type: wall.  Reading zone data...done.
Zone: 26 name: origin-tunnel-ymin type: wall.  Reading zone data...done.
Zone: 27 name: origin-tunnel-xmax type: wall.  Reading zone data...done.
Zone: 58 name: fine type: wall.  Reading zone data...done.
Zone: 78 name: medium type: wall.  Reading zone data...done.
Zone: 98 name: coarse type: wall.  Reading zone data...done.
Zone: 11631 name: interior--fluid-region-1 type: interior.  Reading zone data...done.
Zone: 11567 name: tunnel-zmax type: velocity-inlet.  Reading zone data...done.
Zone: 11568 name: tunnel-xmax type: velocity-inlet.  Reading zone data...done.
Zone: 11569 name: tunnel-ymin type: velocity-inlet.  Reading zone data...done.
Zone: 11570 name: tunnel-xmin type: pressure-outlet.  Reading zone data...done.
Zone: 11571 name: tunnel-ymax type: velocity-inlet.  Reading zone data...done.
Zone: 11572 name: tunnel-zmin type: velocity-inlet.  Reading zone data...done.
Zone: 11597 name: glider type: wall.  Reading zone data...done.
--> FOAM Warning : Found unknown block of type: "73"
    on line 20063727

FINISHED LEXING

Creating patch 0 for zone: 11597 name: glider type: wall
Creating patch 1 for zone: 11572 name: tunnel-zmin type: velocity-inlet
Creating patch 2 for zone: 11571 name: tunnel-ymax type: velocity-inlet
Creating patch 3 for zone: 11570 name: tunnel-xmin type: pressure-outlet
Creating patch 4 for zone: 11569 name: tunnel-ymin type: velocity-inlet
Creating patch 5 for zone: 11568 name: tunnel-xmax type: velocity-inlet
Creating patch 6 for zone: 11567 name: tunnel-zmax type: velocity-inlet
Creating patch 7 for zone: 98 name: coarse type: wall
Creating patch 8 for zone: 78 name: medium type: wall
Creating patch 9 for zone: 58 name: fine type: wall
Creating patch 10 for zone: 27 name: origin-tunnel-xmax type: wall
Creating patch 11 for zone: 26 name: origin-tunnel-ymin type: wall
Creating patch 12 for zone: 25 name: origin-tunnel-xmin type: wall
Creating patch 13 for zone: 24 name: origin-tunnel-ymax type: wall
Creating patch 14 for zone: 23 name: origin-tunnel-zmin type: wall
Creating patch 15 for zone: 21 name: origin-tunnel-zmax type: wall
Creating patch 16 for zone: 2 name: origin-glider type: wall
Creating cellZone 0 name: fluid-region-1 type: fluid
Creating faceZone 0 name: interior--fluid-region-1 type: interior
faceZone from Fluent indices: 376428 to: 12597121 type: interior
patch 0 from Fluent indices: 0 to: 275917 type: wall
patch 1 from Fluent indices: 275918 to: 277552 type: velocity-inlet
patch 2 from Fluent indices: 277553 to: 279196 type: velocity-inlet
patch 3 from Fluent indices: 279197 to: 280584 type: pressure-outlet
patch 4 from Fluent indices: 280585 to: 282229 type: velocity-inlet
patch 5 from Fluent indices: 282230 to: 283974 type: velocity-inlet
patch 6 from Fluent indices: 283975 to: 285625 type: velocity-inlet
patch 7 from Fluent indices: 285626 to: 286929 type: wall
patch 8 from Fluent indices: 286930 to: 289877 type: wall
patch 9 from Fluent indices: 289878 to: 291703 type: wall
patch 10 from Fluent indices: 291704 to: 291771 type: wall
patch 11 from Fluent indices: 291772 to: 291853 type: wall
patch 12 from Fluent indices: 291854 to: 291921 type: wall
patch 13 from Fluent indices: 291922 to: 291999 type: wall
patch 14 from Fluent indices: 292000 to: 292081 type: wall
patch 15 from Fluent indices: 292082 to: 292159 type: wall
patch 16 from Fluent indices: 292160 to: 376427 type: wall


--> FOAM FATAL ERROR: 
Illegal cell label -1 in neighbour addressing for face 12506320

    From function void Foam::polyMesh::initMesh()
    in file meshes/polyMesh/polyMeshInitMesh.C at line 64.

FOAM exiting
I looked a bit on the forum and the closest topic I could find were those:
  1. Illegal cell label -1, error in mesh-conversion, icem
  2. Error by importing .msh format to openfoam
However 1) is quite old and using Icem instead of fluent meshing, and I tried to save as an ascii .cas as suggested in 2) but the error remains.

Would anyone have an idea on how to solve this?

EDIT: Looking at the source code of polyMeshInitMesh.C it seems there is an issue with the cell owning face 12506320, but I don't understand it nor how to fix it.
Code:
#include "polyMesh.H"

// * * * * * * * * * * * * * Private Member Functions  * * * * * * * * * * * //

void Foam::polyMesh::initMesh()
{
    DebugInFunction << "initialising primitiveMesh" << endl;

    // For backward compatibility check if the neighbour array is the same
    // length as the owner and shrink to remove the -1s padding
    if (neighbour_.size() == owner_.size())
    {
        label nInternalFaces = 0;

        forAll(neighbour_, facei)
        {
            if (neighbour_[facei] == -1)
            {
                break;
            }
            else
            {
                nInternalFaces++;
            }
        }

        neighbour_.setSize(nInternalFaces);
    }

    label nCells = -1;

    forAll(owner_, facei)
    {
        if (owner_[facei] < 0)
        {
            FatalErrorInFunction
                << "Illegal cell label " << owner_[facei]
                << " in neighbour addressing for face " << facei
                << exit(FatalError);
        }
        nCells = max(nCells, owner_[facei]);
    }
__________________
Enjoy the flow

Last edited by BenGher; November 18, 2021 at 10:46. Reason: Supplementary information
BenGher is offline   Reply With Quote

Old   December 8, 2021, 07:13
Default
  #2
New Member
 
Ben Gherardi
Join Date: Jun 2016
Posts: 17
Rep Power: 10
BenGher is on a distinguished road
Update

I tried to use the simpler version "FluentMeshToFoam", but end up having the same problem. Currently trying to set up a really simple case (3D sphere) to see if I can reproduce the error, or if it comes from the .stl.

In the meantime if anyone has any tips, or direction for me to look into, I would be glad.

PS: I am aware that the post could be better suited to the "meshing" section of this forum, but I can't delete or move it, and don't want to double post.
__________________
Enjoy the flow
BenGher is offline   Reply With Quote

Old   June 15, 2022, 06:00
Default
  #3
Senior Member
 
Join Date: Dec 2019
Location: Cologne, Germany
Posts: 365
Rep Power: 8
geth03 is on a distinguished road
are you sure that you did export a volume mesh from ansys?
it looks like you did export a surface mesh.
geth03 is offline   Reply With Quote

Old   June 22, 2022, 08:29
Default
  #4
New Member
 
Ben Gherardi
Join Date: Jun 2016
Posts: 17
Rep Power: 10
BenGher is on a distinguished road
Quote:
Originally Posted by geth03 View Post
are you sure that you did export a volume mesh from ansys?
it looks like you did export a surface mesh.
Hi,

I used File > Write > Mesh --> Files of type: Legacy Compressed Mesh Files (*.msh.gz), "write binary files" unticked, so I think so.

I "gzip -d meshfile.msh.gz" in order to get the meshfile.msh...could there be an issue in the decompressing step? I just tried with another mesh, to be certain, and still have the exact same issue.
Attached Files
File Type: txt meshConvertLog.txt (12.5 KB, 7 views)
__________________
Enjoy the flow
BenGher is offline   Reply With Quote

Old   August 6, 2022, 03:36
Default
  #5
New Member
 
Join Date: Sep 2021
Posts: 8
Rep Power: 5
bumble is on a distinguished road
Hi Ben,
I am facing the same error when I import mesh from ICEM to openfoam. Have you found the actual reason for this?
bumble is offline   Reply With Quote

Old   August 8, 2022, 10:01
Default
  #6
New Member
 
Ben Gherardi
Join Date: Jun 2016
Posts: 17
Rep Power: 10
BenGher is on a distinguished road
Hello,

Unfortunately not, which led me to consider other options than Fluent meshing.

I am not familiar with ICEM, but a guy with a similar problem as yours posted this , and it seems he forgot to import/export the volume mesh.

Hope it helps, don't hesitate to share the answer if you find it
__________________
Enjoy the flow
BenGher is offline   Reply With Quote

Old   August 8, 2022, 14:45
Default
  #7
New Member
 
Join Date: Sep 2021
Posts: 8
Rep Power: 5
bumble is on a distinguished road
Hi,
I actually shifted to the Mesh module of ANSYS from ICEM. I didn't get the error when I imported it to OpenFOAM. I came across the thread you mentioned, I think it is one of the reasons to get this error.

In the process, I discovered that you could do a check mesh in the ICEM or probably in Mesh (ANSYS module) too. I used to have some penetrating cells in ICEM, and if I import the same mesh in OpenFOAM, I get the error.

Again, I am not sure the exact reason, but there are probably multiple factors.
bumble is offline   Reply With Quote

Old   October 10, 2023, 00:02
Default
  #8
New Member
 
Weisheng
Join Date: Nov 2019
Posts: 9
Rep Power: 6
cweisheng is on a distinguished road
Not sure if you solved this. I was also caught with some of the errors while attempting to use a fluent mesh with "internal" type face zones that enclose a cell zone intended as a porous zone. The most important things I found:
- use Prepare for Solve in Fluent Meshing to remove the unnecessary parts of the mesh
- export as .msh while unchecking Binary
- run fluent3DMeshToFoam (remember to scale it if your Fluent mesh is in mm and OF parameters are in SI). The utility should ignore the "internal" zones. Check your constant/PolyMesh files to be sure.
ndhar likes this.
cweisheng is offline   Reply With Quote

Reply

Tags
conversion error, fluent3dmeshtofoam, mesh error, openfoam

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
[snappyHexMesh] Error when setting locationsInMesh elonesampaio OpenFOAM Meshing & Mesh Conversion 1 April 3, 2021 17:44
[snappyHexMesh] Creating multiple multiple cell zones with snappyHexMesh - a newbie in deep water! divergence OpenFOAM Meshing & Mesh Conversion 0 January 23, 2019 04:17
[ANSYS Meshing] Is it possible to generate mesh in different cell zones in Ansys meshing? aja1345 ANSYS Meshing & Geometry 0 October 3, 2018 14:22
[mesh manipulation] Importing Multiple Meshes thomasnwalshiii OpenFOAM Meshing & Mesh Conversion 18 December 19, 2015 18:57
[General] 2 datas on one plot Akuji ParaView 46 December 1, 2013 14:06


All times are GMT -4. The time now is 11:46.