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Abstract
IT has long been recognized that under certain conditions some sort of axisymmetric flow is induced within liquid drops as they pass through a viscous medium. The factors which promote and inhibit such internal circulations have been established experimentally for liquid-liquid systems, but there is little or no direct evidence that comparable vortical flows are formed within water drops falling through the atmosphere. In liquid-liquid systems the pattern of flow is generally mapped on a photographic film by the images of small opaque particles moving with the fluid. Garner and Haycock1 made some velocity measurements by obtaining such photographs with a carefully calibrated moving-picture camera and noting the change in position of the particle during a known time interval. However, most of the velocity data have been inferred from terminal velocity measurements and rates of heat and mass transfer between the drop and continuous phases.
Published Version
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