CFD Online Discussion Forums

CFD Online Discussion Forums (
-   FLUENT (
-   -   Periodic Boundary condition. (

A7A April 13, 2012 11:34

Periodic Boundary condition.

I have a problem in making a periodic boundary condition, it happens when i try to make my mesh finer. Fluent gives me this Error

Warning: differing number of faces on these threads.
computed translation deltas: 0.100000 -0.000126
zone 20016: matched 83 out of 83 faces.
zone 30021: matched 83 out of 84 faces.
Error: Failed to make zones periodic.
Error Object: #f

Thank you.

banty April 13, 2012 12:24


This is because of the mismatch of cell centroid of two boundary u are trying to make conformal periodic BC.
U first convert the boundary as interface BC and then go to interface panel and make them periodic (Non-conformal). Non-conformal periodic BC also gives the good result.

A7A April 13, 2012 12:42


could you tell me how to make a non conformal periodic bc.

Thank you.

banty April 13, 2012 13:06

first make the boundary as interface BC to which u want to make periodic and see the web page. it may be halp u.

A7A April 13, 2012 13:34

Thank you for your reply it was helpful.

Edu-R April 13, 2012 19:01


To make a conformal periodic BC you can use the "Match Control" option inside Ansys Mesher.


All times are GMT -4. The time now is 19:23.