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-   -   grid interface problems: (http://www.cfd-online.com/Forums/fluent/29044-grid-interface-problems.html)

ydzhang November 5, 2001 22:30

grid interface problems:
 
the two zones are same,but when create grids interface,two wall zones also created,but when display grid,fluent display the following message: Note: zone-surface: cannot create surface from sliding interface zone. Creating empty surface. Note: zone-surface: cannot create surface from sliding interface zone. Creating empty surface. I don't know how to avoid the problem,the help DOC tell me that no walls BOUNDARY ZONES shrould be created! who has the same experience or know the reason? thanx yd

hampton November 7, 2001 05:04

Re: grid interface problems:
 
Hi,

I got the same errors before ,too. This walls(i.e. wall-XX) are made automatically when you define interfaces. And this errors doesn't make sense in calculation. If you don't want to see this errors, you can delete these. You choose the walls you want to delete in the panel "Surface-Zones-Manage" and "Delete" it.

Thanks.

jilucheng November 8, 2001 04:29

Re: grid interface problems:
 
are you using fluent to simulate unsteady flow? at the sliding interface, please select "periodic", or it will be solid walls

ji

ydzhang November 11, 2001 03:41

Re: grid interface problems:
 
many Thanx to hampton and jilucheng! nowadays,i am assign the wall as symmetry(it's in symmetry plane).the simulation can converge.the result seems reasonable! but i can't believe it completely. the flow is steady! the interfaces are not "periodic".some other advices is looking forward.

saha2122 March 4, 2013 03:10

Hi All...

I modelled a 2D Axymmetric swirl case in the fluent conjugately......... i merged 3 different mesh files... when i want to show mesh after using grid intefaces, I recieve this :
"Note: zone-surface: cannot create surface from sliding interface zone. Creating empty surface. "

what should I do???

chaosh March 4, 2013 19:44

When you mesh, you need to make sure that both faces that you are defining as periodic have an identical mesh - A mapped mesh will ensure you will not have issues when you set interfaces.

s567d May 9, 2013 10:16

Do u get the solution. If yes, let me know ...

Quote:

Originally Posted by saha2122 (Post 411265)
Hi All...

I modelled a 2D Axymmetric swirl case in the fluent conjugately......... i merged 3 different mesh files... when i want to show mesh after using grid intefaces, I recieve this :
"Note: zone-surface: cannot create surface from sliding interface zone. Creating empty surface. "

what should I do???


Far May 9, 2013 12:09

This is not a serious error (in fact no need to worry). Just uncheck these surface from mesh display

Lisa123 February 13, 2016 16:57

Quote:

Originally Posted by Far (Post 426384)
This is not a serious error (in fact no need to worry). Just uncheck these surface from mesh display

I have multiple of the same problem. How do we 'uncheck' them from mesh display?

Kumari February 15, 2016 08:11

Quote:

Originally Posted by Far (Post 426384)
This is not a serious error (in fact no need to worry). Just uncheck these surface from mesh display

Why should such walls be created in the first place when the interfaces are of equal lengths? In such erratic creation, won't momentum convergence be put into threat?

SmallCFD August 15, 2016 17:45

I googled the original problem and I got this :

"The message "Note: zone–surface: cannot create surface from sliding interface zone" appears when Fluent opens and reads the case and data files. It simply means the boundaries of the non–conformal interfaces match exactly, such that there are no non–overlapping sections on either side of the interface."

So, I think it's not a problem. :)

Far August 21, 2016 11:40

yes. It is not a problem.


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