Back to the convection heat transfer problem Solutions to the boundary layer equations are of the form dP dP x y Re L where O for flat plate dx dx dP Re. p L Rewrite the convective heat transfer coefficient aT k T-T h T-T L v=0 k「ar L Define the Nusselt number as aT x Re. D dP u Heat Transfer Su Yongkang School of Mechanical EngineeringHeat Transfer Su Yongkang School of Mechanical Engineering # 5 Back to the convection heat transfer problem… • Solutions to the boundary layer equations are of the form: • Rewrite the convective heat transfer coefficient • Define the Nusselt number as:         = =         = * * * * * * * * * * * * , ,Re ,Pr, , ,Re , where: 0 for flat plate d x d P T f x y d x d P d x d P u f x y L L L T T L y T T T T T T k T T y T k T T q h s y s s s f s y f s x x −                               − −  − − = −   − = −  =  =    =  0 0 0 * * * =          = y f x y T L k h         =   = = * * * 0 * * ,Re ,Pr, * dx dP f x y T L y Nu