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-   -   WARNING:''cannot create surface from sliding interface zone'' (http://www.cfd-online.com/Forums/fluent/109751-warning-cannot-create-surface-sliding-interface-zone.html)

bahar November 26, 2012 02:38

WARNING:''cannot create surface from sliding interface zone''
 
1 Attachment(s)
Hello everybody,
I'm working on a 3D helical H-rotor wind turbine and using moving mesh to simulate fluid.
I received this warning during mesh checking:
''cannot create surface from sliding interface zone'', Is it important enough to notice?
What should I do so?
p.s: domain picture is attached.

Thank you in advance for your attention
Bahar

sondinho November 27, 2012 10:34

Quote:

Originally Posted by bahar (Post 394122)
Hello everybody,
I'm working on a 3D helical H-rotor wind turbine and using moving mesh to simulate fluid.
I received this warning during mesh checking:
''cannot create surface from sliding interface zone'', Is it important enough to notice?
What should I do so?
p.s: domain picture is attached.

Thank you in advance for your attention
Bahar

I've got the same message while simulating dynamic motion of valve. But the results are ok so I would ignore that in your case.

bahar November 28, 2012 01:24

WARNING:''cannot create surface from sliding interface zone''
 
Dear sondinho,
Thank you in advance for your attention. :)

I have serious problem by residuals. Really, in unsteady flow Epsilon residual began to fluctuate until all residuals increase tremendous and finally solution diverge; however, in steady case didn't appear any problem.

Again, I appreciate your attendance.

jamalf64 November 28, 2012 02:32

I think interfaces are very important for moving mesh(sliding mesh) but when you are using MRF and you have conformal mesh they are not important.
if you show me your geometry without mesh, maybe I can halep you but I dont sure.

Be Success.

bahar November 28, 2012 03:14

1 Attachment(s)
Dear Jamal,
Thank you in advance! :)
I've already attached an obvious picture of blades, I have defined required surfaces as interface but I cannot understand why such a problem appear?
Be success.

-mAx- December 14, 2012 10:37

did you create interfaces-couple in Fluent? (grid/interfaces)
Once it is done, you can re-check the mesh and then the warning should disappear

bahar December 14, 2012 15:26

Dear mAX,
Thank you for your attention!:)

Already, I have defined all sliding surfaces as ''Grid Interfaces''! but I recieve this warning in both 2D and 3D flow! :(

Best Regards,
Bahar

kunvd March 21, 2013 05:45

Hello bahar, have you got the solution to the problem ?

bahar March 22, 2013 08:53

Hello kunvd,

This warning did not disappear in my solution while checking results showed that it do not have critical effect on solution.

vasava March 22, 2013 09:36

Did you name the walls related to the interface? If you did, you can delete the name and then import the the mesh. Just to check if fluent can deal with the 'un-named' faces itself.

CFDiran March 22, 2013 09:53

Hi
Your warning is not very important.
I think that this warning is due to differences in the size of the element in sides of interface.

kunvd March 22, 2013 15:00

This is my experience...During the interface creation, empty 'wall' s are created. So, while displaying the mesh, if these empty 'wall's are selected, the warning appears.

P.S. Empty in the sense, these boundary conditions are not applied in your mesh.

Gowrav March 22, 2013 16:03

reply to kunal
 
yes i got the same..


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