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Paper Abstract and Keywords
Presentation 2011-11-24 14:00
Effect of surface active solutes to acoustic bubbles observed with high-speed camera
Shota Deno, Pak-Kon Choi (Meiji Univ.) US2011-70
Abstract (in Japanese) (See Japanese page) 
(in English) Intense ultrasound produces acoustic bubbles which repeat the oscillation of expansion and contraction. Surfactant molecules affect bubble dynamics such as a bubble coalescence when adsorbed with bubble/liquid interface. We observed a high-speed shadowgraph of acoustic bubbles in aqueous solutions of sodium dodecyl sulfate using a high speed camera with a speed of 1,000,000 fps. The experimental result of time evolution of bubble diameter showed that a surfactant-adsorbed bubble favors spherical oscillation. Histograms of maximum bubble diameter were obtained from the high-speed movies. The histograms measured at ultrasonic frequencies of 37, 87 and 123 kHz indicated that number of large- size bubble considerably decreased compared to the case in pure water and this tendency is marked at higher frequencies. The histograms measured at various SDS concentrations at 87 kHz showed that the decrease in large-size bubbles is significant at the concentration of 5 mM. These results are elucidated in terms of electrostatic repulsion force between charged bubbles, which inhibits bubble coalescence. The increase in rectified diffusion is also noticed in the histogram.
Keyword (in Japanese) (See Japanese page) 
(in English) Acoustic bubble / high-speed camera / surfactant / bubble coalescence / rectified diffusion / / /  
Reference Info. IEICE Tech. Rep., vol. 111, no. 311, US2011-70, pp. 27-30, Nov. 2011.
Paper # US2011-70 
Date of Issue 2011-11-17 (US) 
ISSN Print edition: ISSN 0913-5685    Online edition: ISSN 2432-6380
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All rights are reserved and no part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopy, recording, or any information storage and retrieval system, without permission in writing from the publisher. Notwithstanding, instructors are permitted to photocopy isolated articles for noncommercial classroom use without fee. (License No.: 10GA0019/12GB0052/13GB0056/17GB0034/18GB0034)
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Conference Information
Committee US  
Conference Date 2011-11-24 - 2011-11-24 
Place (in Japanese) (See Japanese page) 
Place (in English) Tokai Univ. 
Topics (in Japanese) (See Japanese page) 
Topics (in English) General 
Paper Information
Registration To US 
Conference Code 2011-11-US 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Effect of surface active solutes to acoustic bubbles observed with high-speed camera 
Sub Title (in English)  
Keyword(1) Acoustic bubble  
Keyword(2) high-speed camera  
Keyword(3) surfactant  
Keyword(4) bubble coalescence  
Keyword(5) rectified diffusion  
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1st Author's Name Shota Deno  
1st Author's Affiliation Meiji University (Meiji Univ.)
2nd Author's Name Pak-Kon Choi  
2nd Author's Affiliation Meiji University (Meiji Univ.)
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Speaker Author-2 
Date Time 2011-11-24 14:00:00 
Presentation Time 25 minutes 
Registration for US 
Paper # US2011-70 
Volume (vol) vol.111 
Number (no) no.311 
Page pp.27-30 
#Pages
Date of Issue 2011-11-17 (US) 


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