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Periodic velocity inlet BC

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Old   February 9, 2015, 07:05
Default Periodic velocity inlet BC
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I am trying to get the pressure drop from a 3D channel (corrugated channel-not a straight wall). I have taken an element from the channel with one unit of corrugation (or step) and applied periodic velocity at inlet symmetry at axis and no-slip BCs on walls. Once the convergence reached, I have taken pressure gradient from periodic conditions panel and multiplied with length of unit element. However, the experimental pressure drop is not matching with numerical pressure drop. Did I make any mistake somewhere? How to get the pressure drop value for whole channel?
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channel flow, periodic bc

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