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[Commercial meshers] icem fluent mesh with cyclic boundary condition

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Old   April 5, 2011, 02:12
Default icem fluent mesh with cyclic boundary condition
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Dear all

I am currently having a problem about my icem fluent mesh. I tried to run a 3d simulation of flow past a cylinder with cyclic boundary condition on the front and back surfaces. However, OpenFOAM always complains face matching problem of the patches with cyclic boundary condition.

Create time

Create polyMesh for time = 0

face 0 area does not match neighbour 4 by 71.4286% -- possible face ordering problem.
patch:FB my area:2.96875 neighbour area:1.40625 matching tolerance:0.001
Mesh face:104 vertices:4((0 -1.75 1) (0 -3 1) (3 -3 1) (1.75 -1.75 1))
Neighbour face:108 vertices:4((-0.5 -0.5 0) (0 -0.5 0) (0 -1.75 0) (-1.75 -1.75 0))
Rerun with cyclic debug flag set for more information.

From function cyclicPolyPatch::calcTransforms()
in file meshes/polyMesh/polyPatches/constraint/cyclic/cyclicPolyPatch.C at line 180.

FOAM exiting

It looks like there is a face ordering problem.

I have group the front and back faces in the same group. Furthermore, I extrude my 3d mesh from a 2d mesh to avoid conformal surface problem. However, there is no such problem with wall boundary for the fron and back surfaces.

Does anyone know a solution to the problem? or any other hex mesh tool I can use other than ICEM?

Thanks a lot.
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Old   April 5, 2011, 03:36
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Problem is solved by creating cyclic patch group using createPatch.
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Old   February 24, 2020, 03:34
Default cyclic b.c. for mesh generated by fluent
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Hi everyone,

I made my geometry in fluent and converted in OpenFoam (which is of5x). then since I want to have a cyclic boundary in my geometry I create patchDict and I got the cyclic type boundary in polymesh boundary file and then I changed the type of boundary of the fields in 0 folder but after running, I got error in decomposepardict which I used metis that decompose library is missing and when I used scotch I got the error something doesn't match. how did you solve your problem?

kind regards,
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