Journal
ULTRASONICS SONOCHEMISTRY
Volume 9, Issue 5, Pages 231-236Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/S1350-4177(02)00083-4
Keywords
multi-frequency; sonication; cavitation yield
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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. (C) 2002 Elsevier Science B.V. All rights reserved.
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