Experimental study on the surface wave mode of a liquid film under the coupling effect of acoustic oscillation and electric field

This paper conducted an experimental study of a charged liquid film subjected to the coupling effect of acoustic oscillations and an electrostatic field perpendicular to the plane. The experimental system was established. Three different substances—de-ionized water, ionized liquid (BMIMBF4), and a 50 wt. % glycerin–water solution—were utilized to form the liquid film. An oscillator was employed to generate the acoustic oscillations, while the electrostatic field was produced by a high-voltage power supply. Both the increase in oscillating frequency and electric field intensity were observed to alter the surface waveform and elevate the surface wavenumber. Furthermore, the experimental findings align qualitatively with the previously established theoretical results.