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how to set inlet and outlet BC for oscillatory flow around a circular cylinder

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Old   March 23, 2012, 01:59
Default how to set inlet and outlet BC for oscillatory flow around a circular cylinder
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Hi all,

I think this must be an easy question for you guys, somehow I got stuck for some time now as a green hand and am searching online for a solution but with no luck up till now...

So, the question is as in the title, could anyone share how you exactly specify the inlet and outlet boundary condition for 0/p and 0/u for an oscillatory flow around a cylinder??
Say for example I have an oscillatory flow with the velocity (ux,0,0), in which ux=U_m*sin(2*pi*f*t).

I have tried oscillatingFixedValue for u and zeroGradient for p at inlet, and zeroGradient for u and 0 for p at outlet but got 0 values at all timesteps...

Any help is appreciated.
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