Abstract
An experimental method for the investigation of droplet oscillations in a gaseous medium is presented. The droplets are produced using vibrating orifice droplet generators. Experiments are carried out with droplets in the diameter range from 91 μm to 288 μm using propanol-2, water, and n-hexadecane; the gaseous host medium is air. Oscillatory motions of the fundamental mode n = 2 and of the first higher order mode n = 3 occur during the disintegration of the liquid jet produced by the droplet generator. The periodical production of the droplets allows the observation and evaluation of each phase of the motion under quasi-steady conditions. Surface energies are determined from the droplet shapes on photos. The periods of the oscillations are found to be very close to the prediction of the linear theory.
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Brenn, G., Frohn, A. An experimental method for the investigation of droplet oscillations in a gaseous medium. Experiments in Fluids 15, 85–90 (1993). https://doi.org/10.1007/BF00190947
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DOI: https://doi.org/10.1007/BF00190947