CFD Online Discussion Forums - [ICEM] Auto-Create Periodic Vertices [How to]

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Auto-Create Periodic Vertices [How to]

Has anyone gotten auto-create periodic vertices to work in ICEM? I'm specifically speaking of v14 -- I can't recall it this option was available in previous versions. There is no help documentation for this feature and am currently looking at a blocking topology where it would be SUPER useful.

this is the help that should have been in the doc...

Quote:

"Auto Create" option creates periodic links between block vertices on the periodic boundaries automatically. This works on a 3D Blocking with model periodicity defined. It finds the periodic twins through Geometry transformation and blocking edge connectivity. Periodic vertices that are associated to points are found directly by geometry transformation. It expects that periodic points are with in a geometric tolerance of 1.0e-05. Periodic vertices that are projected to curves are found through periodic curve pairs or blocking edge connectivity along the periodic direction. Surface associated vertices are first found by transformation or best closest match.

Perhaps it is not working for you because your verts are not in the right locations (beyond the tolerance), or perhaps there is some issue with verts on one side having an association conflict...? Do you get an error message?

It works for me and I tried it a bunch of different ways.

I mean, are any of these requirements (tolerance, associations) documented anywhere? The only error meshing I get is "auto create periodics failed".

No, I think it was a new Beta feature at 14.0... It was not supposed to be released, but something went wrong with the beta flag that was supposed to hide it.

Since it was not release, we didn't do all the normal QA, DOC, etc.

If it is not working for you, I suggest using the "create" option to create the pairs manually.

Best regards,

Simon

Periodic Problem

I seem to have a challenge with association of the periodic vertices to the geometry vertices..they seem to "run away". See the picture. I cant seem to figure out what the issue is.
Someone to help.