Abstract
Spectra of droplet size resulting from coalescence are compared, assuming the collision efficiency of Hocking's theory and that of Davis and Sartor's new theory. The Davis-Sartor collision efficiency shows no evidence of the 19-μ cutoff predicted by Hocking. Also, Davis and Sartor predict a non-zero asymptotic value for collision efficiency as the droplet ratio approaches unity, but a considerably smaller value than Hocking's for droplet ratios wound 0.5.
Results show that the Davis-Sartor theory will not permit growth as rapid as Hocking's when a significant number of droplets are initially larger than 19 μ. In addition, when no droplets are greater than 19 μ, the Davis-Sartor theory will permit slow growth, whereas Hocking's predicts no growth.
