[jiejie]

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.

[jiejie]

Problem is solved by creating cyclic patch group using createPatch.

[Arghavani]

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,
Arghavn