Document Detail


Respective contribution of cavitation and convective flow to local stirring in sonoreactors.
MedLine Citation:
PMID:  21382572     Owner:  NLM     Status:  In-Data-Review    
Abstract/OtherAbstract:
The knowledge of respective parts of convection and cavitation to the stirring induced by ultrasound at one exact position into a sonoreactor is useful for all processes implementing surfaces exposed to sonication. PIV measurement allows real fluid motion determination, whereas the electrochemical technique gives an equivalent flow velocity considered as the sum of all stirring contributions to the electrode. Thus, by a simple subtraction between real fluid velocity and equivalent flow velocity, it is possible to identify the contribution of each phenomenon. Applied to low frequency reactors, it had been observed that cavitation is the preponderant phenomenon, with a contribution of stirring close to the electrode always more than 90%. High frequency reactors, frequently known to produce less cavitation, have shown that at the focal zone, if it concerns HIFU, cavitation becomes preponderant and reaches similar values to those close to the ultrasonic horn in low frequency sonoreactors.
Authors:
J-Y Hihn; M-L Doche; A Mandroyan; L Hallez; B G Pollet
Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Ultrasonics sonochemistry     Volume:  18     ISSN:  1873-2828     ISO Abbreviation:  Ultrason Sonochem     Publication Date:  2011 Jul 
Date Detail:
Created Date:  2011-03-08     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9433356     Medline TA:  Ultrason Sonochem     Country:  Netherlands    
Other Details:
Languages:  eng     Pagination:  881-7     Citation Subset:  IM    
Copyright Information:
Copyright © 2011 Elsevier B.V. All rights reserved.
Affiliation:
UTINAM UMR-Université de Franche-Comté/CNRS-6213, équipe SRS, IUT Département chimie, 30 avenue de l'Observatoire, 25 009 Besançon, France.
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