Abstract
The phenomenology of high-frequency single drop formation from a capillary in air has been studied for single liquids and surfactant solutions. Attention has been given mostly to the region of high flow rates, close to the transition from single drops to a continuous jet. At these flow rates, periodicity and “chaotic” behavior have been elucidated in terms of the drop volume. A linear correlation between the transition flow rate and γD/ρ has been observed, where γ and ρ are the surface tension and density of the liquid, and D is the diameter of the capillary. This correlation may be useful for monitoring surface tension variations in continuous processes, and for estimating dynamic surface tensions of surfactant solutions, for surface ages of about 10-50 msec. An appreciable effect of the surfactant concentration on the transition flow rate has been noted within a certain concentration range. The CMC values of the surfactants fall in this range, an observation which suggests a new possible approach to the...
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