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Confuse about Nu Number in Laminar Flow

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Old   January 30, 2014, 08:44
Default Confuse about Nu Number in Laminar Flow
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Hi I did simple heat transfer problem of flow throw a circular pipe with constant heat flux at wall. Usually for laminar flow with constant heat flux the Nusselt Number should be 4.36 ? when I view surface nusselt number from Report>Wall Fluxes>Surface Nusselt number it give me Nusslet number as 11.61 ? Why this differ from the theoretical value as (4.36)?

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