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Paper Abstract and Keywords
Presentation 2016-04-18 13:55
Acoustic bubbles after stopping ultrasound
Kyuichi Yasui, Toru Tuziuti, Wataru Kanematsu (AIST) US2016-5
Abstract (in Japanese) (See Japanese page) 
(in English) When liquid is irradiated by strong ultrasound, many bubbles are created by acoustic cavitation. What is the life of the acoustic bubbles after stopping ultrasound? Relatively large bubbles move upward by buoyancy and disappear at the liquid surface. Relatively small bubbles, on the other hand, completely dissolve into the liquid before reaching the liquid surface. Some others would be stabilized by the attachment of impurities on their surfaces, which is called ultrafine bubbles. In the present study, numerical simulations of the complete dissolution of a relatively small air bubble into liquid water saturated with air are performed taking into account the effect of the inertia of the surrounding liquid. Surprisingly, the temperature and pressure inside a bubble increase up to 2500 K and 7 GPa, respectively at the final moment of the complete dissolution. However, there would be no radical formation because at the moment the bubble content is only nitrogen molecules and the temperature is lower than that required for the dissociation of nitrogen molecules.
Keyword (in Japanese) (See Japanese page) 
(in English) ultrafine bubbles / nanobubble / complete dissolution / inertia of the surrounding liquid / numerical simulations / high temperature and pressure / /  
Reference Info. IEICE Tech. Rep., vol. 116, no. 5, US2016-5, pp. 23-28, April 2016.
Paper # US2016-5 
Date of Issue 2016-04-11 (US) 
ISSN Print edition: ISSN 0913-5685    Online edition: ISSN 2432-6380
Copyright
and
reproduction		 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)
Download PDF US2016-5

Conference Information
Committee US  
Conference Date 2016-04-18 - 2016-04-18 
Place (in Japanese) (See Japanese page) 
Place (in English) Nishi-Waseda Campus, Waseda University 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Nonlinear Acoustics, General, etc
(Co-sponsored by Nonlinear Acoustics Society of Japan ) 
Paper Information
Registration To US 
Conference Code 2016-04-US 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Acoustic bubbles after stopping ultrasound 
Sub Title (in English)  
Keyword(1) ultrafine bubbles  
Keyword(2) nanobubble  
Keyword(3) complete dissolution  
Keyword(4) inertia of the surrounding liquid  
Keyword(5) numerical simulations  
Keyword(6) high temperature and pressure  
Keyword(7)  
Keyword(8)  
1st Author's Name Kyuichi Yasui  
1st Author's Affiliation National Institute of Advanced Industrial Science and Technology (AIST) (AIST)
2nd Author's Name Toru Tuziuti  
2nd Author's Affiliation National Institute of Advanced Industrial Science and Technology (AIST) (AIST)
3rd Author's Name Wataru Kanematsu  
3rd Author's Affiliation National Institute of Advanced Industrial Science and Technology (AIST) (AIST)
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Speaker Author-1 
Date Time 2016-04-18 13:55:00 
Presentation Time 25 minutes 
Registration for US 
Paper # US2016-5 
Volume (vol) vol.116 
Number (no) no.5 
Page pp.23-28 
#Pages 6 
Date of Issue 2016-04-11 (US) 

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