Please use this identifier to cite or link to this item: http://hdl.handle.net/1822/30811

TitleEffect of β-PVDF Piezoelectric Transducers’ positioning on the acoustic streaming flows
Author(s)Catarino, Susana Oliveira
Miranda, J. M.
Minas, Graça
KeywordsPVDF
Piezoelectricity
Acoustic streaming
Mixing
Issue dateSep-2014
PublisherMDPI
JournalMicromachines
Abstract(s)This paper reports the numerical and experimental analysis of the acoustic streaming effect in a fluidic domain. The actuation of a piezoelectric transducer generates acoustic waves that propagate to the fluids, generating pressure gradients that induce the flow. The number and positioning of the transducers affect the pressure gradients and, consequently, the resultant flow profile. Two actuation conditions were considered: (1) acoustic streaming generated by a 28 μm thick β-poly(vinylidene fluoride) (β-PVDF) piezoelectric transducer placed asymmetrically relative to the fluidic domain and (2) acoustic streaming generated by two 28 μm thick β-PVDF piezoelectric transducers placed perpendicularly to each other. The transducers were fixed to the lower left corner of a poly(methyl methacrylate) (PMMA)cuvette and were actuated with a 24 Vpp and 34.2 MHz sinusoidal voltage. The results show that the number of transducers and their positioning affects the shape and number of recirculation areas in the acoustic streaming flows. The obtained global flows show great potential for mixing and pumping, being an alternative to the previous geometries studied by the authors, namely, a single transducer placed symmetrically under a fluidic domain.
TypeArticle
URIhttp://hdl.handle.net/1822/30811
DOI10.3390/mi5030654
ISSN2072-666X
Publisher versionwww.mdpi.com/journal/micromachines
Peer-Reviewedyes
AccessOpen access
Appears in Collections:CAlg - Artigos em revistas internacionais/Papers in international journals
DEI - Artigos em revistas internacionais

Files in This Item:
File Description SizeFormat 
micromachines-05-00654_Susana.pdfDocumento principal8,13 MBAdobe PDFView/Open

Partilhe no FacebookPartilhe no TwitterPartilhe no DeliciousPartilhe no LinkedInPartilhe no DiggAdicionar ao Google BookmarksPartilhe no MySpacePartilhe no Orkut
Exporte no formato BibTex mendeley Exporte no formato Endnote Adicione ao seu ORCID