Situation: Consider the evaporation of water aerosol droplets with an initial diameter 0.01[cm] into a dry air at 25[C]. The spray has a velocity of 100[cm/s]. The bulk air is assumed to be dry throughout the process. The vapor pressure of water at that temperature is 0.0313 [atm]. The diffusion coefficient of water in air is 0.282[cm2/s] and the viscosity of air is 1.86105[Pas]. Requirements: Please, estimate the time needed for the water droplets to shrink to 0.001[cm]. Ans.: 1.05 [s] (Using correlation 2-64)