Collisions of Small Cloud Droplets: Gas Kinetic Effects
- 1 July 1972
- journal article
- Published by American Meteorological Society in Journal of the Atmospheric Sciences
- Vol. 29 (5) , 911-915
- https://doi.org/10.1175/1520-0469(1972)029<0911:coscdg>2.0.co;2
Abstract
Gas kinetic effects in the region between two small approaching cloud droplets were investigated by means of slip flow theory. The resulting correction to the force coefficients derived for creeping flow eliminates the “collision barrier” noted in previous work and thus the need for assuming an abitrary collision criterion. It was found that inclusion of the gas kinetic correction leads to collision efficiencies for droplets 30 μ in radius. Abstract Gas kinetic effects in the region between two small approaching cloud droplets were investigated by means of slip flow theory. The resulting correction to the force coefficients derived for creeping flow eliminates the “collision barrier” noted in previous work and thus the need for assuming an abitrary collision criterion. It was found that inclusion of the gas kinetic correction leads to collision efficiencies for droplets 30 μ in radius.Keywords
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