50 Years Ago

摘要

'Internal circulations within liquid drops' - 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 ... Although an internal circulation theory has been very attractive in considerations of meteorological phenomena, there appears to be little experimental evidence to substantiate such a theory... In this communication we discuss a technique which affords velocity measurements and at the same time outlines the vortical core ... The streamlines within the drop are recorded photographically by means of dye trails.