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Natural convection and periodic boundary layer

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Old   August 29, 2005, 11:12
Default Natural convection and periodic boundary layer
George Thomas
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Hai everyone, I am a beginer in Fluent.Now iam doing project on the heat and flow in airside radiator ducts.Here the ducts will be rib roughened.This is a free convection case.Here the ducts are on constant heat flux and air is allowed to move around it.Here the rib roughness for over the duct is symetrical.So can i take a model a part of it and give periodic boundary condition?Or,since the temperature of the air changes as it moves away,would the periodic boundary condition be a bad choice in this natural convection case. Thanks, George.
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