Article ID: e25.34
The effect of the cylinder with a cavity around the target location on underwater acoustic streaming at 28.2 kHz was investigated. Finite element analysis was performed to optimize the dimensions of the transparent acrylic cylinder by the resonance frequency analysis of the whole structure to increase sound pressure in the cavity. Simulation methods ignoring cavitation bubbles and considering bubbles were used to obtain distributions of sound pressure and acoustic streaming at the initial period and stable state separately. For comparison, particle image velocimetry experiments were conducted using the adjusted and original cylinders. The results showed that when the gap was smaller than 25 mm, the cavity had an obvious enhancement effect on streaming velocity, increasing it to twice the maximum value.
