07 - Convective Heat Transfer

Convective Heat Transfer by Cengle yunis
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  Convective Heat Transfer ãEvaluating processes where there is convective heat transferred to/from a solid surface ãExternal or Internal ãGas or liquid  Convection ãTwo Major Types ãForced  –Flow is driven by external force ãPump ãMoving surface ãNatural  –Flow is driven by density difference due to temperature gradient in the fluid  Convective Heat Transfer ( ) ambsurf surf conv TTAhq   −=  Calculating “h” ãForced Convection  –Nu = ARe m Pr  n , where A, m and n are constants ãNatural Convection  –Nu = A(GrPr) m  = Ara m , whre A and m are constants Fluid of ConductionFluid of Convection k h u N   ==  δ 
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