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Velocity Inlet BC -- Flow Reversal

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Old   May 8, 2011, 05:45
Default Velocity Inlet BC -- Flow Reversal
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I have analyzed a flow field over a cylinder in pulsating flow (unsteady flow). At the inlet, we have periodic forcing with high amplitudes.

Velocity inlet: u(t)=u0+2*u0*sin(w*t);

At some time the flow becomes reversal at the inlet because the time dependent amplitude is twice the steady state amplitude (u0). We have implied a velocity inlet for the inlet boundary condition

What are the possible problems for thsi type of bc in fluent?
Can I trust the results?

Are there any tutorials, notes for this type of BC and flow reversal at the inlet for FLUENT?

Any help,
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