Atmospheric air with T ∞ = 300 K and U ∞ = 2.1 m/s flows parallel to a flat surface. The surface temperature is 325 K. Experiments with laminar boundary-layer flow have shown that Nu x ∼ Ren x Pr 1/3...

Atmospheric air with T_∞
= 300 K and U_∞
= 2.1 m/s flows parallel to a flat surface. The surface temperature is 325 K. Experiments with laminar boundary-layer flow have shown that Nu_x
∼ Ren
_xPr^1/3
. At locations where the distances from the leading edge are x = 0.42 m and x = 1.5 m, the wall heat fluxes are measured to be 107 W m2 s and 57 W m2 s, respectively. What would the evaporation mass fluxes be at these locations if, instead of a heated surface, the surface was at thermal equilibrium with air, the air was dry, and the surface was wetted with water?