Ultrasonic cavitation in CO2-expanded N, N-dimethylformamide (DMF)

Abstract

Highlights Ultrasonic cavitation is recorded by high-speed camera and hydrophone in a gas-expanded liquid system. Content of CO 2 has an important influence on evolution of bubble cloud. Cavitation intensity depends on ultrasonic power and gas content. The combination of ultrasound and gas-expanded liquid system greatly promotes mass transfer.

Dynamics of double bubbles under the driving of burst ultrasound

“…The gas nuclei in liquids will grow to be visible bubbles under the driving of ultrasound with enough acoustic pressure. This phenomenon is called ultrasonic cavitation [1] , [2] , [3] . Pulsation of bubbles will generate high temperature and pressure therein.…”

Influence of rigid wall on the nonlinear pulsation of nearby bubble

“…Irradiation of ultrasound wave with enough amplitude into liquid makes the gas nuclei grow to visible bubbles. This phenomenon is named as ultrasonic cavitation [1] , [2] , [3] , [4] . When the bubbles collapse, high temperature is generated in them and enormous energy is released to the surrounding liquid [5] .…”