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Fluent Periodic flow error

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Old   November 24, 2008, 09:50
Default Hi all, I am trying to cre
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Debashis Maji
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Hi all,
I am trying to creat a periodic zone, but hav got the following error :

Periodic zone [()] 6
Shadow zone [()] 5
Rotational periodic? (if no, translational) [yes] no
Create periodic zones? [yes] yes
Auto detect translation vector? [yes] yes

Warning: differing number of faces on these threads.
computed translation deltas: -0.000436 -0.000421 -0.200000
zone 6: matched 0 out of 500 faces.
zone 5: matched 0 out of 600 faces.

Error: Failed to make zones periodic.
Error Object: #f

can anybody please help me with the msg. I cant understand what it means?
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Old   June 27, 2012, 08:03
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Normally there could two reason for this error. First check the origin of rotation. So how do we check, open the design in design modeler then use point entity to check the centre of rotation coordinate. u can even draw on the surface of your model and find the centre of rotation. (anyway works). if its rotating along z axis then get the x and y coordinate and place it in fleunt>cell zone condition> rotation axis origin.

if it does work then maybe its due to different number of cell on the face of the two surface. It a non conformal periodic.( you have change the type of B.c from wall to interface then use Mesh Interface where you select the surfaces, check the periodic B.C set the angel offset and create periodic.
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