Paper Abstract and Keywords |
Presentation |
2011-11-24 15:25
Effect of wettability on an oscillating bubble adhered to solid surface under ultrasound irradiation Kenji Yoshida, Shunich Morioka, Yuto Ueda (Doshisha Univ.), Daisuke Koyama, Kentaro Nakamura (Tokyo Inst. of Tech.), Yoshiaki Watanabe (Doshisha Univ.) US2011-73 |
Abstract |
(in Japanese) |
(See Japanese page) |
(in English) |
It was investigated how the wettability of solid surface affects the oscillation of an attached bubble in ultrasonic field, by using simultaneous observation system with a high-speed video camera and a laser Doppler vibrometer. Glass and silicon were used as wall material. The observation was performed when a single bubble was fixed in an acoustic standing wave with a frequency of 28 kHz. The initial bubble radius was ranged from 60 mm to 160 mm. We investigated how bubble oscillation depended on driving sound pressure. The investigation shows the following two results. i) The amplitude of fundamental component (27 kHz) of displacement waveform linearly increased with the increase of sound pressure and reached to its maximum at a certain sound pressure. When the driving pressure was larger than the threshold pressure, the amplitude of the fundamental component decreased. ii) Sub-harmonic component was generated in the sound pressure region where the amplitude of fundamental component decreased. In such case, non-spherical oscillation mode always appeared. In addition, we observed the effect of wettability on bubble oscillation. When the sound pressure was small, the bubble surface fluctuation with very small amplitude was observed only in the case of the silicon wall. This result implies that the non-spherical oscillation easily occur when the contact angle between bubble and solid surface is larger. |
Keyword |
(in Japanese) |
(See Japanese page) |
(in English) |
Microbubble / Solid surface / Wettability / Non-spherical oscillation / / / / |
Reference Info. |
IEICE Tech. Rep., vol. 111, no. 311, US2011-73, pp. 43-47, Nov. 2011. |
Paper # |
US2011-73 |
Date of Issue |
2011-11-17 (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) |
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US2011-73 |
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 wettability on an oscillating bubble adhered to solid surface under ultrasound irradiation |
Sub Title (in English) |
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Keyword(1) |
Microbubble |
Keyword(2) |
Solid surface |
Keyword(3) |
Wettability |
Keyword(4) |
Non-spherical oscillation |
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1st Author's Name |
Kenji Yoshida |
1st Author's Affiliation |
Doshisha University (Doshisha Univ.) |
2nd Author's Name |
Shunich Morioka |
2nd Author's Affiliation |
Doshisha University (Doshisha Univ.) |
3rd Author's Name |
Yuto Ueda |
3rd Author's Affiliation |
Doshisha University (Doshisha Univ.) |
4th Author's Name |
Daisuke Koyama |
4th Author's Affiliation |
Tokyo Institute of Technology (Tokyo Inst. of Tech.) |
5th Author's Name |
Kentaro Nakamura |
5th Author's Affiliation |
Tokyo Institute of Technology (Tokyo Inst. of Tech.) |
6th Author's Name |
Yoshiaki Watanabe |
6th Author's Affiliation |
Doshisha University (Doshisha Univ.) |
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Speaker |
Author-1 |
Date Time |
2011-11-24 15:25:00 |
Presentation Time |
25 minutes |
Registration for |
US |
Paper # |
US2011-73 |
Volume (vol) |
vol.111 |
Number (no) |
no.311 |
Page |
pp.43-47 |
#Pages |
5 |
Date of Issue |
2011-11-17 (US) |
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