Characterization of the activity of ultrasound emitted in a perpendicular liquid flow using Particle Image Velocimetry (PIV) and electrochemical mass transfer measurements

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TitreCharacterization of the activity of ultrasound emitted in a perpendicular liquid flow using Particle Image Velocimetry (PIV) and electrochemical mass transfer measurements
Type de publicationJournal Article
Year of Publication2015
AuteursBarthes M, Mazue G, Bonnet D, Viennet R, Hihn J-Y, Bailly Y
JournalULTRASONICS
Volume59
Pagination72-78
Date PublishedMAY
Type of ArticleArticle
ISSN0041-624X
Mots-clésEquivalent velocity, Liquid circulation, Mass transfer, PIV, Power ultrasound
Résumé

The present work is dedicated to the study of the interactions between a liquid circulation and a perpendicular acoustic wave propagation. A specific experimental setup was designed to study one transducer operating at 20 kHz, with the help of electrochemical mass transfer measurements combined with Particle Image Velocimetry (PIV) determination. Electrodes were located on the wall opposite to the acoustic emission. Experiments were performed for various Reynolds numbers: from 0 to 21700 (different liquid flow rates and viscosities). Both PIV and electrochemical measurements methods were found to be relevant, and had delivered complementary information. Even if PIV showed that the plume due to streaming was highly deflected by the additional flow, electrochemical measurements showed that there was still an activity, higher than in silent conditions, on the wall facing the transducer. Thus the ultrasound contribution remained noticeable on the surface opposite to the transducer even for a disturbed hydrodynamic environment due to the presence of a liquid circulation perpendicular to the wave propagation. (C) 2015 Elsevier B.V. All rights reserved.

DOI10.1016/j.ultras.2015.01.015