---- External Forced Convection
— skin friction coefficient / Fanning friction factor w =shear stress at the wall = ( )at y=0 dy du ... local convective heat transfer coefficient ( ) ( / ) ( ) 0 = − − ∂ ∂ = − ≡ ∞ = ∞ T T k T y T T q h w f y w x x ( ) =0.99 − − T T∞ T T w w L 以下之定義
