Convection Heat Transfer Correlations Key is to fully understand the type of problem and then make sure you apply the appropriate convective heat transfer coefficient correlation External flow For laminar flow over flat plate dP 0 ao 2 X nu 0.332Re . 2D- Nur k 0.66 4Rel2 pr X For mixed laminar and turbulent flow over flat plate h hamdx +hurd 0 uL 0037Re4871/P3 0.6<Pr<60 5×10·<Rer<10 Xc=5×105 Fq.7.41 Heat Transfer Su Yongkang School of Mechanical EngineeringHeat Transfer Su Yongkang School of Mechanical Engineering # 5 Convection Heat Transfer Correlations • Key is to fully understand the type of problem and then make sure you apply the appropriate convective heat transfer coefficient correlation External Flow For laminar flow over flat plate For mixed laminar and turbulent flow over flat plate = 0 dx dP T ,U Ts y  3 1 2 1  = 0.332Rex Pr k h x Nu x x 3 1 2 1  = 0.664Rex Pr k h x Nu x x       =  +  L xc turb xc x hlamdx h dx L h 1 0 ( ) Eq. 7.41 5 10 Re 10 Re 5 10 0.6 Pr 60 0.037 Re 871 Pr 5 x,c 5 8 4 5 1 3 L    =          = − L NuL