The Problem of Convection Heat transfer Mass transfer Nu,=f(x',Re,,Pr)Sh,=f(x',Re,.Sc Nux=f(Rex:Pr) Shx =f(Res:Sc) Experimental (Empirical)approach----perform measurements Theoretical approach----solve equationsThe Problem of Convection ( ) *,Re ,Pr Nu f x x x = Nu f x = (Re ,Pr x ) Heat transfer Mass transfer ( ) *,Re , x x Sh f x Sc = Sh f Sc x = (Re , x ) Experimental (Empirical) approach ----perform measurements Theoretical approach ----solve equations