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-   -   periodic boundary condition (http://www.cfd-online.com/Forums/fluent/40594-periodic-boundary-condition.html)

elyyan April 15, 2006 12:34

periodic boundary condition
 
Hi, I am trying to simulate a 3D domain in fluent where I have periodic boundary conditions on all six faces. I have created the mesh in Gridgen, and I did not specify the periodic translate faces in it, but all the faces are of the same area and shape. How may I specify the periodic boundary conditions in Fluent without going back and regenrating the mesh in Gridgen or Gambit. I have specified the faces as walls and tried to changed their status in fluent, but did not see "periodic" in the BC type drop down menue. I will appreciate any help I can get. Thanks alot for the help.


Joe April 16, 2006 01:30

Re: periodic boundary condition
 
Try changing the phase to 'mixture' in the Boundary conditions panel if that's available.

an April 17, 2006 03:23

Re: periodic boundary condition
 
have you modified them by tui?

grid/modify-zones/make-periodic

hope this help you.

elyyan April 18, 2006 21:12

Re: periodic boundary condition
 
It worked, Thanks alot, I did not know that you have to type the command, I thought that you assign it in the drop down menue. One more question if you can help me please: I have a pressure drop gradient, dp/dx =1, across my domain, how do I assign it in fluent, plus, I need to assign all the domain boundaries to allow fluid flow, not walls. If you can give me hints I will appreciate it. Thanks again elyyan

ruby April 21, 2006 16:30

Re: periodic boundary condition
 
In the drop down menu of Define you will get periodic conditions, there you can pick specify pressure gradient and give a value of pressure gradient as you want, but I cant tell about the boundary conditions.


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