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What is Periodic condition??

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Old   April 9, 2008, 05:10
Default What is Periodic condition??
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Dear friends,

I am trying to simulate "flow over an infinite flat plate". I am taking a plate of unit width. I think I have to use "interface domain" BC to solve this. It asks to specify 2 regions in that. I have (a)inlet (b)outlet (c)symmetry & (d)wall-no slip boundary conditions. (c) & (d) are in between (a) & (b).

Questions: Which boundary is periodic?? Which regions I have to specify for "interface domain" as region-1 & region-2 ? At the same time, I have some known velocity at the inlet.

Plz reply.

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Old   April 9, 2008, 06:12
Default Re: What is Periodic condition??
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(a) and (b) should be specified as periodic. You can decompose the symmtery into two symmteries and specify that as periodics as well.

You will have to specify a mass flow rate or pressure gradient to sustian the flow in domain.

- Usman
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Old   April 10, 2008, 08:40
Default Re: What is Periodic condition??
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Thanks Osman. But, once if I specify "inlet" & "outlet" as "region 1" & "region 2" periodic interfaces, I will not be able to apply any mass flow rate, pre grad or velocity etc. How can I apply these at inlet/outlet??
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Old   April 10, 2008, 09:44
Default Re: What is Periodic condition??
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You will have to activate mass and momentum box on domain interface form and then specify pressure gradient or mass flow rate.

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