# Why can't I make the boundaries periodic?

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 December 11, 2007, 09:48 Why can't I make the boundaries periodic? #1 Alina Guest   Posts: n/a I'm now doing some exercises on the annular blade cascades. In the case, two boundaries should be made periodic. However, even I set the mesh of the two boundaries exactly the same, I can't make them periodic. The mesh was created using ANSYS ICEM v11.0, the Fluent version is v6.3.36, I used the "Creating Conformal Periodic Zones" method in the help document to create the periodic boundary, but failed. I even tried a 1/4 part of a pipe, but still failed to make the boundary periodic even the mesh can't be as simple as it is. Can anyone tell me how can I create a conformal periodic rotational boundary in this condition? Thanks.

 December 11, 2007, 10:48 Moving mesh #2 Rym Guest   Posts: n/a Hi every one, I want to simulate an aeration tanks using CFD, I have to use moving mesh but I can't inderstand how to use interface conditions. Please can any one help me. thanks . Rym

 December 15, 2007, 06:29 Re: Why can't I make the boundaries periodic? #3 m.serkan yıldırım Guest   Posts: n/a Hi.. I think your problem is about your rotating axis... In fluent the default rotating center line x=0, y=0, z=0 and rotating axis is Z ... for example if you draw your pipe model on x axis (center line of the straight pipe is on x=0, y=0, z=0 and it lies on x axis) you should set rotating axis x under define/boundary conditions/(Your rotating zone)... but before all of this don't forget to make all your couple of your periodic faces to be meshed periodicaly foxer likes this.

 December 15, 2007, 07:53 Re: Why can't I make the boundaries periodic? #4 Alina Guest   Posts: n/a Oh, that's it. Thanks.

 April 9, 2012, 03:12 #5 New Member     Lizhong Hu Join Date: Apr 2012 Location: Beijing, China Posts: 2 Rep Power: 0 Thank you so much, it helps me too!!!

 April 12, 2012, 14:06 #6 Member   AHMAD Join Date: Apr 2012 Posts: 54 Rep Power: 6 Hi. Is it better to use icem for a 2d conjugate heat transfer problem, or using ANSYS standard mesher is better. Thank you.

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