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-   -   icem fluent mesh with cyclic boundary condition (http://www.cfd-online.com/Forums/openfoam-meshing-other/86874-icem-fluent-mesh-cyclic-boundary-condition.html)

jiejie April 5, 2011 02:12

icem fluent mesh with cyclic boundary condition
 
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 April 5, 2011 03:36

Problem is solved by creating cyclic patch group using createPatch.


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