Question

Air at freestream velocity U∞=16 ms, and free steam temperature      T∞=50℃ is flowing over a plate surface that is at temperature Ts=100℃. The velocity and thermal boundary layers developing on the surface have been shown in the figure. Also shown are the tangents to the velocity and temperature profiles at the surface y=0. If the density of air is ρ∞=1.1 kgm3, viscosity μ=1.963×10-5kgm∙s, and thermal conductivity k=0.0274Wm∙K then, calculate

(a)        the wall shear stress, τw

(b)       coefficient of skin friction, Cf

(c)        convection heat transfer coefficient, h

(d)       the Nusselt number, if the length of the plate is L=1m.

Answer 1