Periodic Boundary condition.

A7A · April 13, 2012, 12:34

Hi

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, 13:24

Hi,

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, 13:42

Hi,

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

Thank you.

banty · April 13, 2012, 14:06

first make the boundary as interface BC to which u want to make periodic and see the web page. it may be halp u.
https://www.sharcnet.ca/Software/Flu...g/node1356.htm

A7A · April 13, 2012, 14:34

Thank you for your reply it was helpful.

Edu-R · April 13, 2012, 20:01

Hi!

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

Regards

April 13, 2012, 12:34	Periodic Boundary condition.	#1
A7A Member AHMAD Join Date: Apr 2012 Posts: 54 Rep Power: 0	Hi 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.

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April 13, 2012, 13:24		#2
banty Member banty Join Date: Mar 2012 Posts: 52 Rep Power: 15	Hi, 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.

April 13, 2012, 13:42		#3
A7A Member AHMAD Join Date: Apr 2012 Posts: 54 Rep Power: 0	Hi, could you tell me how to make a non conformal periodic bc. Thank you.

April 13, 2012, 14:06		#4
banty Member banty Join Date: Mar 2012 Posts: 52 Rep Power: 15	first make the boundary as interface BC to which u want to make periodic and see the web page. it may be halp u. https://www.sharcnet.ca/Software/Flu...g/node1356.htm

April 13, 2012, 14:34		#5
A7A Member AHMAD Join Date: Apr 2012 Posts: 54 Rep Power: 0	Thank you for your reply it was helpful.

April 13, 2012, 20:01		#6
Edu-R Member Edu Join Date: Sep 2009 Posts: 36 Rep Power: 18	Hi! To make a conformal periodic BC you can use the "Match Control" option inside Ansys Mesher. Regards