EVOLUTION OF THE FLOW PATTERN AND ACOUSTIC RADIATION DURING THE MERGER OF A FREE-FALLING DROPLET WITH A LIQUID IN AN ELECTROSTATIC FIELD

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Abstract

For the first time, synchronized high-speed recording of the flow pattern and acoustic pressure was performed using a hydrophone during the merging of a falling drop of distilled water with a quiescent liquid in an electrostatic field. This is in the impact flow regime, where the kinetic energy of the falling drop significantly exceeds its potential surface energy. In the electrostatic field, a reduction in the chronogram duration, a refinement of the flow pattern, an increase in the frequency, and a more complex structure of the resonant sound packet are observed. The observed changes reflect the influence of the electrostatic field on the droplet flow pattern, which is noticeably pronounced during the formation of the second and third cavities and during the detachment of gas cavities emitting a resonant acoustic signal.

About the authors

Yu. D Chashechkin

Ishlinsky Institute for Problems in Mechanics, Russian Academy of Sciences

Email: chakin@ipmnet.ru
Moscow, Russia

V. E Prokhorov

Ishlinsky Institute for Problems in Mechanics, Russian Academy of Sciences

Email: prohorov@ipmnet.ru
Moscow, Russia

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