THE EFFECT OF ELECTRIC CHARGES AND FIELDS ON THE COLLISIONS OF VERY SMALL CLOUD DROPS,
RAND CORP SANTA MONICA CALIF
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The growth of cloud droplets by collision and coalescence is a basic process in the development of precipitation. The paper discusses the influence of electric charges and fields on collisions of small cloud droplets using accurate electrostatic forces Davis, 1962, 1964 and recently improved values for hydrodynamic forces. Of primary interest are cases where collisions will occur only under the influence of electrostatic forces Sartor, 1960. Using Hockings hydrodynamics it was estimated that electrostatic forces began to produce collisions in droplets with radii under 15 microns when alpha exceeded 0.01 esu sq cm. The effect was most important when the droplets were nearly the same size.