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Spatial Distribution of Acoustic Cavitation Bubbles at Different Ultrasound Frequencies

Ashokkumar, M, Lee, J, Iida, Y, Yasui, K, Kozuka, T, Tuziuti, T and Towata, A (2010) Spatial Distribution of Acoustic Cavitation Bubbles at Different Ultrasound Frequencies ChemPhysChem: a European journal of chemical physics and physical chemistry, 11 (8). pp. 1680-1684.

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Images of sonoluminescence, sonophotoluminescence and sonochemiluminescence are recorded in order to semi-quantitatively compare the spatial distribution of the cavitation activity at three different ultrasound frequencies (170 kHz, 440 kHz and 700 kHz) and at various acoustic amplitudes. At all ultrasound frequencies investigated, the sonochemically active cavitation zones are much larger than the cavitation zones where sonoluminescence is observed. Also, the sonochemically active bubbles are observed at relatively lower acoustic amplitudes than that required for sonoluminescence bubbles to appear. The acoustic power required for the observation of the initial cavitation bubbles increases with an increase in the ultrasound frequency. The cavitation bubbles are observed relatively uniformly throughout the reactor at 170 kHz whereas they are located away from the transducer at the higher frequencies used in this study. While these observations highlight the complexities involved in acoustic cavitation, possible reasons for the observed results are discussed.

Item Type: Article
Subjects : Chemical and Process Engineering
Divisions : Faculty of Engineering and Physical Sciences > Chemical and Process Engineering
Authors :
Ashokkumar, M
Iida, Y
Yasui, K
Kozuka, T
Tuziuti, T
Towata, A
Date : 7 June 2010
DOI : 10.1002/cphc.200901037
Uncontrolled Keywords : Science & Technology, Physical Sciences, Chemistry, Physical, Physics, Atomic, Molecular & Chemical, Chemistry, Physics, CHEMISTRY, PHYSICAL, PHYSICS, ATOMIC, MOLECULAR & CHEMICAL, acoustic cavitation, sonochemistry, sonoluminescence, sonophotoluminescence, spatial distributions, MULTIBUBBLE SONOLUMINESCENCE, SONOCHEMICAL DEGRADATION, AQUEOUS-SOLUTION, MICROSPHERES, LUMINESCENCE, SONICATION, EMISSION, DYNAMICS
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Additional Information : Item not available from this repository
Depositing User : Symplectic Elements
Date Deposited : 27 Jul 2016 10:06
Last Modified : 30 Jul 2020 17:15

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