Question: An industrial process involves the evaporation of water from a liquid film that forms on a contoured surface. Dry air is passed over the surface

An industrial process involves the evaporation of water from a liquid film that forms on a contoured surface. Dry air is passed over the surface and from laboratory measurements the convection heat transfer correlation is of the form Nu L = 0.43ReL0.58 Pr0.4

(a) For an air temperature and velocity of 27°C and 10 m/s, respectively, what is the rate of evaporation from a surface of 1 -m2 area and characteristic length L = 1 m? Approximate the density of saturated vapor as PA.sat = 0.0077 kg/m3.

(b) What is the steady-state temperature of the liquid film?

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