Investigation of mechanisms of cavitation-abrasive treatment by high-speed filming. Part 2

The efficiency of the ultrasonic cavitation-abrasive treatment process is due to the combined effect of cavitation formations and abrasive particles on the surface. In order to thoroughly study the mechanisms of surface treatment, high-speed filming of ultrasonic liquid surface treatment without and with the addition of an abrasive was carried out. As a result of the analysis and comparison of video fragments, five main mechanisms of the impact of abrasive particles on the surface were determined: impact of an abrasive particle moving in an acoustic flow; particle movement along the surface; impact of a particle on the surface during the collapse of the cavitation region; particle oscillations in a pulsating cavitation region; rotation of an abrasive particle. The first part of the work describes the treatment without the addition of an abrasive, the second does it with the addition of it.