Please use this identifier to cite or link to this item: http://hdl.handle.net/1822/30795

TitleNumerical prediction of acoustic streaming in a microcuvette
Author(s)Catarino, Susana Oliveira
Miranda, J. M.
Lanceros-Méndez, S.
Minas, Graça
KeywordsAcoustic streaming
Piezoelectricity
Microfluidics
OpenFoam
Modelling
Issue dateSep-2014
PublisherWiley
JournalThe Canadian Journal of Chemical Engineering
Abstract(s)This paper reports the modelling and simulation of the acoustic streaming phenomenon, generated by a polymeric piezoelectric transducer, used for promoting fluid mixing in microfluidic devices. The acoustic streaming process consists of the absorption of the acoustic waves by the fluid which results in a pressure drop along the direction of the acoustic propagation. The generated pressure drop promotes the flow and consequently mixing. This process overcomes the slow molecular diffusion resultant from the low Reynolds number that leads to laminar flows in microcuvettes. The numerical model comprises the compressible Navier‐Stokes equations, whose variables were expanded in first‐ and second‐order values, to overcome the great difference between the piezoelectric and the fluid flow time scales. The model was implemented in OpenFoam software, through finite volumes numerical methods. It was concluded that the excitation of the transducer above the microcuvette generates a mean global flow with visible recirculation of fluids within the domain, which can be used to predict the fluid flow behaviour.
TypeArticle
URIhttp://hdl.handle.net/1822/30795
DOI10.1002/cjce.22057
ISSN1939-019X
Publisher versionwileyonlinelibrary.com
Peer-Reviewedyes
AccessRestricted access (UMinho)
Appears in Collections:CAlg - Artigos em revistas internacionais/Papers in international journals
DEI - Artigos em revistas internacionais

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