A spherical water droplet 2 mm in diameter is moving in atmospheric air with a constant speed of 6 m/s. The air is at 20°C. a. Calculate the heat transfer rate between the droplet surface and air,...

A spherical water droplet 2 mm in diameter is moving in atmospheric air with a constant speed of 6 m/s. The air is at 20°C.

a. Calculate the heat transfer rate between the droplet surface and air, assuming that the droplet surface is at 27°C.

 b. Repeat Part a, this time assume that evaporation at the rate of
is taking place at the surface of the droplet.