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dc.contributor.authorCastro-Hernández, E
dc.contributor.authorGarcía-Sánchez, P
dc.contributor.authorTan, SH
dc.contributor.authorGañán-Calvo, AM
dc.contributor.authorBaret, JC
dc.contributor.authorRamos, A
dc.date.accessioned2018-11-13T04:04:47Z
dc.date.available2018-11-13T04:04:47Z
dc.date.issued2015
dc.identifier.issn1613-4982
dc.identifier.doi10.1007/s10404-015-1603-3
dc.identifier.urihttp://hdl.handle.net/10072/101350
dc.description.abstractElectroactuation of liquid–liquid interfaces offers promising methods to actively modulate droplet formation in droplet-based microfluidic systems. Here, flow-focusing junctions are coupled to electrodes to control droplet production in the well-known jetting regime. In this regime, a convective instability develops leading to droplet formation at the end of a thin and uniform, long liquid finger. We show that in AC electric fields, the jet length is a function of both the magnitude of the applied voltage and the electrical parameters such as the frequency of the AC field and the conductivity of the dispersed phase. We explain that dependency using a simple transmission line model along the liquid jet. An optimum frequency to maximize the liquid ligament length is experimentally observed. Such length simply cannot be obtained by other means under the same operating conditions, in the absence of the AC signal. At low frequency, we reach a transition from a well-behaved, uniform jet brought about near the optimum frequency to highly unstable liquid structures in which axisymmetry is lost rather abruptly.
dc.description.peerreviewedYes
dc.languageEnglish
dc.language.isoeng
dc.publisherSpringer
dc.relation.ispartofpagefrom787
dc.relation.ispartofpageto794
dc.relation.ispartofissue4
dc.relation.ispartofjournalMicrofluidics and Nanofluidics
dc.relation.ispartofvolume19
dc.subject.fieldofresearchMechanical engineering
dc.subject.fieldofresearchNanotechnology
dc.subject.fieldofresearchNanotechnology not elsewhere classified
dc.subject.fieldofresearchcode4017
dc.subject.fieldofresearchcode4018
dc.subject.fieldofresearchcode401899
dc.titleBreakup length of AC electrified jets in a microfluidic flow-focusing junction
dc.typeJournal article
dc.type.descriptionC1 - Articles
dc.type.codeC - Journal Articles
dc.description.versionAccepted Manuscript (AM)
gro.rights.copyright© 2015 Springer Berlin Heidelberg. This is an electronic version of an article published in Microfluidics and Nanofluidics, 2015, Volume 19, Issue 4, pp 787–794. Microfluidics and Nanofluidics is available online at: http://link.springer.com/ with the open URL of your article.
gro.hasfulltextFull Text
gro.griffith.authorTan, Say Hwa H.


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