論文

査読有り 国際誌
2011年1月

Development and optimization of acoustic bubble structures at high frequencies

Ultrasonics Sonochemistry
  • Judy Lee
  • ,
  • Muthupandian Ashokkumar
  • ,
  • Kyuichi Yasui
  • ,
  • Toru Tuziuti
  • ,
  • Teruyuki Kozuka
  • ,
  • Atsuya Towata
  • ,
  • Yasuo Iida

18
1
開始ページ
92
終了ページ
98
記述言語
英語
掲載種別
研究論文(学術雑誌)
DOI
10.1016/j.ultsonch.2010.03.004
出版者・発行元
ELSEVIER SCIENCE BV

At high ultrasound frequencies, active bubble structures are difficult to capture due to the decrease in timescale per acoustic cycle and size of bubbles with increasing frequencies. However the current study demonstrates an association between the spatial distribution of visible bubbles and that of the active bubble structure established in the path of the propagating acoustic wave. By monitoring the occurrence of these visible bubbles, the development of active bubbles can be inferred for high frequencies. A series of still images depicting the formation of visible bubble structures suggest that a strong standing wave field exists at early stages of wave propagation and weakens by the increase in the attenuation of the acoustic wave, caused by the formation of large coalesced bubbles. This attenuation is clearly demonstrated by the occurrence of a force which causes bubbles to be driven toward the liquid surface and limit standing wave fields to near the surface. This force is explained in terms of the acoustic streaming and traveling wave force. It is found that a strong standing wave field is established at 168 kHz. At 448 kHz, large coalesced bubbles can significantly attenuate the acoustic pressure amplitude and weaken the standing wave field. When the frequency is increased to 726 kHz, acoustic streaming becomes significant and is the dominant force behind the disruption of the standing wave structure. The disruption of the standing wave structure can be minimized under certain pulse ON and OFF ratios. © 2010 Elsevier B.V.

リンク情報
DOI
https://doi.org/10.1016/j.ultsonch.2010.03.004
PubMed
https://www.ncbi.nlm.nih.gov/pubmed/20452265
Web of Science
https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:000282853200017&DestApp=WOS_CPL
Scopus
https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=77956424897&origin=inward
Scopus Citedby
https://www.scopus.com/inward/citedby.uri?partnerID=HzOxMe3b&scp=77956424897&origin=inward
ID情報
  • DOI : 10.1016/j.ultsonch.2010.03.004
  • ISSN : 1350-4177
  • PubMed ID : 20452265
  • SCOPUS ID : 77956424897
  • Web of Science ID : WOS:000282853200017

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