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su_junwei January 15, 2009 21:01

Dear foamers I drew a me
Dear foamers

I drew a mesh in Gridgen, which is attached below

After exporting it with Fluent 2D format, I used the fluentMeshToFoam to convert the mesh into the openfoam native format and used checkMesh to check if the mesh is ok.

But I got the following error
Create time

Create polyMesh for time = constant

Time = constant

Mesh stats
points: 1602
edges: 4855
faces: 4479
internal faces: 1891
cells: 1226
boundary patches: 2
point zones: 0
face zones: 0
cell zones: 0

Number of cells of each type:
hexahedra: 240
prisms: 986
wedges: 0
pyramids: 0
tet wedges: 0
tetrahedra: 0
polyhedra: 0

Checking topology...
Boundary definition OK.
Point usage OK.
Upper triangular ordering OK.
Topological cell zip-up check OK.
Face vertices OK.
Face-face connectivity OK.
Number of regions: 1 (OK).

Checking patch topology for multiply connected surfaces ...
Patch Faces Points Surface
unspecified-4 136 272 ok (not multiply connected)
frontAndBackPlanes 2452 1602 ok (not multiply connected)

Checking geometry...
Domain bounding box: (0 0 -0.0141421) (1 1 0.0141421)
Boundary openness (-1.71389e-18 -5.92719e-19 7.71249e-19) OK.
***High aspect ratio cells found, Max aspect ratio: 1.18337e+197, number of cells 1226
<<Writing 1226 cells with high aspect ratio to set highAspectRatioCells
Minumum face area = 0.000230689. Maximum face area = 0.00194315. Face area magnitudes OK.
Min volume = 1.66667e-300. Max volume = 2e-300. Total volume = 2.12333e-297. Cell volumes OK.
#0 Foam::error::printStack(Foam: at ~/OpenFOAM/OpenFOAM-1.4.1/src/OpenFOAM/OSspecific/Unix/printStack.C:203
#1 Foam::sigFpe::sigFpeHandler(int) at ~/OpenFOAM/OpenFOAM-1.4.1/src/OpenFOAM/OSspecific/Unix/signals/sigFpe.C:130
#2 Uninterpreted: [0xffffe420]
#3 ?? in "/lib/"
#4 acos in "/lib/"
#5 Foam::primitiveMesh::checkFaceOrthogonality(bool, Foam::HashSet<int,> >*) const at ~/OpenFOAM/OpenFOAM-1.4.1/src/OpenFOAM/meshes/primitiveMesh/primitiveMeshCheck/p rimitiveMeshCheck.C:481
#6 Foam::checkGeometry(Foam::polyMesh const&, bool, bool) at ~/OpenFOAM/OpenFOAM-1.4.1/applications/utilities/mesh/manipulation/checkMesh/che ckGeometry.C:95
#7 main at ~/OpenFOAM/OpenFOAM-1.4.1/applications/utilities/mesh/manipulation/checkMesh/che ckMesh.C:107
#8 __libc_start_main in "/lib/"
#9 Foam::regIOobject::readIfModified() in "/home/sujunwei/OpenFOAM/OpenFOAM-1.4.1/applications/bin/linuxGccDPDebug/checkMe sh"

The errors above indicates that high aspect ratio encountered. However, from the graph above we can find that it is not the truth.

In the conversion using fluentMeshToFoam, the mesh can be altered?

The mesh file is also attached

file:///home/sujunwei/OpenFOAM/sujunwei-1.4.1/run/tutorials/boussinesqBuoyantFoa m/t4.cas

Have you encounter similar problems?

Best Regards,Junwei

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