title: Enhancement of ultrasonic cavitation yield by multi-frequency sonication.
abstract: The paper reports the enhanced effect of multi-frequency ultrasonic irradiation on cavitation yield. The cavitation yield is characterized by electrical conductivity determination, fluorescence intensity determination and iodine release method. Two-frequency (28 kHz/0.87 MHz) orthogonal continuous ultrasound, two-frequency (28 kHz/0.87 MHz) orthogonal pulse ultrasound and three-frequency (28 kHz/1.0 MHz/1.87 MHz) orthogonal continuous ultrasound have been used. It has been found that the combined irradiation of two or more frequencies of ultrasound can produce a significant increase in cavitation yield compared with single frequency irradiation. The possible mechanisms of the enhanced effect are briefly discussed.
authors.affiliation: State Key Laboratory of Modern Acoustics, Institute of Acoustics, Nanjing University, Nanjing 210093, PR China. fengruo@nju.edu.cn
authors.forename: Ruo
authors.initials: R
authors.lastname: Feng
authors.forename: Yiyun
authors.initials: Y
authors.lastname: Zhao
authors.forename: Changping
authors.initials: C
authors.lastname: Zhu
authors.forename: T J
authors.initials: TJ
authors.lastname: Mason