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how could stabilize pressure at inlet boundary

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Old   July 15, 2012, 07:34
Red face how could stabilize pressure at inlet boundary
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amin masumi
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hello, thanks for your attention please help me.
I have an unsteady modelling, a piston pump that is modeled correctly, but I have a problem that pressure at the pressure inlet boundary increasing in every time step, how can I stabilize it?
thanks a lot!
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