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Old   April 9, 2008, 11:06
Default ICEM periodicity nodes after mesh generation...
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Standard situation: 0. I have periodic geometry sector 30deg (it's can be mirrored by half) 1. I made the half of mesh in HEXA (30deg/2=15deg), 2. Then i generate unstructured mesh and mirror of it in the MED. Now i have full periodic (but only geometricaly)sector 30deg. 3. I need mark all nodes in ICEM as periodic! It's crazy to do it by pair of nodes.

Whether somebody knows how to do two nodes sets periodicity?
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Old   April 9, 2008, 18:16
Default Re: ICEM periodicity nodes after mesh generation..
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1) define the mesh periodicity mesh/global mesh setup/Set up periodicity

2) define the vertices ( from blocks ) with are periodic blocking/edit block / define periodic vertices

3) generate the pre mesh

4) convert to unstructured mesh

5) check mesh/ periodic problems

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Old   April 10, 2008, 02:25
Default I mean not this
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I know about this tehnology.

I mean the case when you need build mesh in HEXA without of periodicity. And after make the mirror copy of half mesh about of plane. In this case you have the periodicity on two opposite side about of symmetry plane.

But ICEM not understand these two opposite side as sides with periodicity. Easy way make periodic conditions on each of pair nodes, but i have 10000 pair of nodes.

May be is it possible to use a special options or a script for do this? Is anybody have an experience in this?
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Old   April 10, 2008, 11:37
Default Re: I mean not this
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No simple way to do it at the mesh level. Best to go back to your blocking and mark the periodic vertices there - and re-create the unstructured mesh. Also - it's probably best to build the hexa model for the mesh you want to run. It's possible that the mirroring may break the periodicity setup... You could test that on a small model.
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Old   April 10, 2008, 13:08
Default Re: I mean not this
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Hi Andrey,

If you created a mesh on half the sector and mirrored it, there is no need to specify periodicity. The periodic pair, in this case, would be periodic by virtue of the fact they are the same mesh simply mirrored.

ICEM CFD only needs to know about periodicity to create the mesh. Since you have already created the mesh, there is no need to specify periodicity in ICEM CFD, only in the physics pre-processor (what code are you using?).

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Old   April 11, 2008, 02:52
Default Re: I mean not this
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Hello! I build the mesh, only. But my foreign colleagues, us I understand, use the ICEM as preprocessor for CFX (or STAR-CD) (may be, they not have a big experience, i dont know). And demand from me implementation of ICEM periodicity condition in mesh. Any case I believe in possibility to do it in ICEM! But I dont know how Please, anybody HELP me!!!
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Old   April 21, 2008, 08:41
Default Re: I mean not this
Rohit Kumar Batra
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try mirroring the geometry and blocks! then create the mesh.

this may help in your case, not sure!
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Old   April 22, 2008, 15:04
Default Yes, I do it now.
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Yes, Now I mirror geom(tetin) and then mirror blocks + make periodic condition on mirrored blocking. But it's not so good to, because I have some complecs structure of blocking
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Old   May 1, 2012, 17:11
Join Date: May 2012
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venkat_aero2007 is on a distinguished road
I am quite new to ICEM CFD software. I am trying to mesh a rotor. If you have any tutorial about meshing rotor, could you please send it to my email:

could you please tell me the strategy that you followed to mesh your rotor
thanks in advance for your information.
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