This study experimentally investigated the flow characteristics of gas-liquid two-phase acoustic flow exiting a rectangular slit, aiming to control flow using ultrasonic transducers. The width of the rectangular slit placed downstream of the ultrasonic transducer was varied, and the velocity field of the jet passing through the slit was measured using particle image velocimetry (PIV). The results revealed that the maximum velocity of the jet increases in gas-liquid two phase flow compared to single-phase flow, and that a wider slit width yields a higher maximum velocity.
Shinbo et al. (Wed,) studied this question.