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Extrapolation of Results after solving under Periodic Boundary Conditions

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Old   March 14, 2012, 12:58
Lightbulb Extrapolation of Results after solving under Periodic Boundary Conditions
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I have been simulating a air heater duct that has been roughened on one surface by attaching discrete ribs. I used a periodic boundary condition to solve heat transfer (constant heat flux for absorber plate). After calculating the nusselt number(for the portion that is in the periodic geometry part) how do I calculate the average over the whole of the plate?
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extrapolation, periodic

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