# defining periodic boundary on an annular face

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 December 18, 2007, 07:57 defining periodic boundary on an annular face #1 jaysree Guest   Posts: n/a I am doing 2D simulation on the annular reegion two rotating cylinder using axisymmetric swirl flow. For this I need periodic boundary on the annular face. But I donot know how to define the periodic boundraies.Kindly help me. Thnak you verymuch.

 December 19, 2007, 00:03 Re: defining periodic boundary on an annular face #2 Vijay Guest   Posts: n/a Hi Jaysree, For a periodic boundary without any pressure drop, there is only one input you need to consider: whether the geometry is rotationally or translationally periodic. With Regards, Vijay

 December 19, 2007, 06:29 Re: defining periodic boundary on an annular face #3 jaysree Guest   Posts: n/a That is correct. But how to define the boundary in gambit. though I know partially the procedure to make the boundary periodic in gambit, but donot have any idea for putting which boundary to be periodic. For example if I have a rotating face connected by 4 edges, which edge will be periodic. Kindly help me. Thank you very much for ur help

 December 19, 2007, 06:49 Re: defining periodic boundary on an annular face #4 Vijay Guest   Posts: n/a Dear Friend, To apply a "periodic" boundary condition for use with a FLUENT solver, you must first create a mesh hard link between the pair of edges (2-D) or faces (3-D) to which the boundary condition is to apply. In addition, you must assign a PERIODIC boundary type to both edges (or faces) in the pair, and both edges (or faces) must constitute members of a single entity set. With Regards, Vijay

 December 20, 2007, 03:54 Re: defining periodic boundary on an annular face #5 jaysree Guest   Posts: n/a Can I use axisymmetric swirl model with periodic boundaries.

 December 20, 2007, 04:30 Re: defining periodic boundary on an annular face #6 Vijay Guest   Posts: n/a Dear Friend, Please wait for 2 or 3 days i will send u the help file, because now i am out of station...... Regards, Vijay

 December 20, 2007, 04:46 Re: defining periodic boundary on an annular face #7 jaysree Guest   Posts: n/a Thank you verymuch.

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