Generation and control of acoustic cavitation structure

Abstract

The generation and control of acoustic cavitation structure are a prerequisite for application of cavitation in the field of ultrasonic sonochemistry and ultrasonic cleaning. The generation and control of several typical acoustic cavitation structures (conical bubble structure, smoker, acoustic Lichtenberg figure, tailing bubble structure, jet-induced bubble structures) in a 20-50 kHz ultrasonic field are investigated. Cavitation bubbles tend to move along the direction of pressure drop in the region in front of radiating surface, which are the premise and the foundation of some strong acoustic cavitation structure formation. The nuclei source of above-mentioned acoustic cavitation structures is analyzed. The relationship and mutual transformation of these acoustic cavitation structures are discussed.

Investigations into lubrication in grinding processes using MWCNTs nanofluids with ultrasonic-assisted dispersion

“…Then the pressure of the surrounding liquid rises and the bubbles begin to implode. Finally, the collapsing bubbles generate very strong impact shock waves: this process is called cavitation (Bai et al, 2014).…”

Ultrasonic cavitation at liquid/solid interface in a thin Ga–In liquid layer with free surface

“…The cavitation bubble characteristic inside water has been widely studied because water is transparent [16] , [17] , [18] , [19] , [20] , [21] , [22] . Some typical cavitation structures, such as Pit cavitation [16] , Smoker cavitation [17] , Tailing cavitation [18] , conical cavitation [19] , and other cavitation structures [20] , [21] , [22] , have been discovered and studied. The cavitation characteristic inside a thin water layer has been studied by Moussatov et al [23] and Bai et al [24] , [25] , [26] , [27] .…”

Numerical Simulations of the Nonlinear Interaction of a Bubble Cloud and a High Intensity Focused Ultrasound Field

“…This can give way to very high temperature elevations at microscopic scale [10]. The characterization of a cavitation field generated by a high amplitude ultrasound wave is complex and was the subject of many experimental and theoretical studies [10][11][12][13][14][15].…”