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Paper Abstract and Keywords
Presentation 2013-01-24 16:10
Studies on the dynamics of settling microspheres observed by dynamic ultrasound scattering method -- Competition between the long-ranged hydrodynamic and electrostatic interactions --
Kazuki Sugita, Tomohisa Norisuye, Qui Tran-cong-miyata (Kyoto Inst. of Tech.) US2012-95 EA2012-126
Abstract (in Japanese) (See Japanese page) 
(in English) So far we have developed a novel methodology called dynamic sound scattering method. The technique is based on the self-correlation function approach, which enables us to measure the diameter of microparticles and to investigate stability of suspensions. Suspensions of hydrophobic polystyrene with surfactants were investigated in the previous studies. Because the particles are much thicker than typical electrical double layers, the effects of surface charges on the standard deviation of sedimentation velocity have been not taken in account. In this study, we investigate the system where both the hydrodynamic and electrostatic interactions play an important role in the particle setting dynamics. As the result, it was found that the standard deviation of the velocity significantly differs from the existing theory without electrostatic interactions. On the contrary, the theory well reproduces the experimental results when salts are added to the system to screen the electrostatic interaction.
Keyword (in Japanese) (See Japanese page) 
(in English) Ultrasound / Scattering / Microsphere / Electrostatic Interaction / / / /  
Reference Info. IEICE Tech. Rep., vol. 112, no. 387, US2012-95, pp. 43-46, Jan. 2013.
Paper # US2012-95 
Date of Issue 2013-01-17 (US, EA) 
ISSN Print edition: ISSN 0913-5685    Online edition: ISSN 2432-6380
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 US2012-95 EA2012-126

Conference Information
Committee US EA  
Conference Date 2013-01-24 - 2013-01-25 
Place (in Japanese) (See Japanese page) 
Place (in English) Kambaikan, Doshisha Univ. 
Topics (in Japanese) (See Japanese page) 
Topics (in English) [Joint Meeting on Acoustics and Ultrasonics Subsociety] Engineering/Electro Acoustics, Ultrasonic and Underwater Acoustics,and Related Topics 
Paper Information
Registration To US 
Conference Code 2013-01-US-EA 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Studies on the dynamics of settling microspheres observed by dynamic ultrasound scattering method 
Sub Title (in English) Competition between the long-ranged hydrodynamic and electrostatic interactions 
Keyword(1) Ultrasound  
Keyword(2) Scattering  
Keyword(3) Microsphere  
Keyword(4) Electrostatic Interaction  
1st Author's Name Kazuki Sugita  
1st Author's Affiliation Kyoto Institute of Technology (Kyoto Inst. of Tech.)
2nd Author's Name Tomohisa Norisuye  
2nd Author's Affiliation Kyoto Institute of Technology (Kyoto Inst. of Tech.)
3rd Author's Name Qui Tran-cong-miyata  
3rd Author's Affiliation Kyoto Institute of Technology (Kyoto Inst. of Tech.)
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Speaker Author-1 
Date Time 2013-01-24 16:10:00 
Presentation Time 20 minutes 
Registration for US 
Paper # US2012-95, EA2012-126 
Volume (vol) vol.112 
Number (no) no.387(US), no.388(EA) 
Page pp.43-46 
Date of Issue 2013-01-17 (US, EA) 

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