For the first time, synchronized video recording of the flow pattern and acoustic pressure by a hydrophone was performed during the merging of a falling drop of distilled water with a liquid at rest in an electrostatic field. The generator anode is connected to the tip of a capillary drop dispenser, the flat cathode is placed on the bottom of a pool filled with tap water. In the impact flow mode, when the kinetic energy of the falling drop significantly exceeds its potential surface energy, a reduction in the chronogram duration, a refinement of the flow pattern and an increase in the frequency of the resonant packet are observed when the electrostatic field is applied. The observed changes indicate a strong influence of the electrostatic field on the structure of droplet flows in the phase of formation and separation of gas cavities emitting resonant acoustic signals.
Chashechkin et al. (Wed,) studied this question.