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dc.contributor.authorLiu, Jing
dc.contributor.authorYap, Yit Fatt
dc.contributor.authorNguyen, Nam-Trung
dc.date.accessioned2017-05-03T13:14:57Z
dc.date.available2017-05-03T13:14:57Z
dc.date.issued2009
dc.date.modified2014-08-13T23:55:14Z
dc.identifier.issn1613-4982
dc.identifier.doi10.1007/s10404-008-0358-5
dc.identifier.urihttp://hdl.handle.net/10072/62245
dc.description.abstractThis paper investigates the behavior of microdroplets flowing in microchannels with a series of diffuser/nozzle structures. Depending on the imposed flow direction, the serial structures can act either as a series of diffusers or nozzles. Different serial diffuser/nozzle microchannels with opening angles ranging from 15࠴o 45࠷ere considered. A 2D numerical model was employed to study the dynamics of the microdroplet during its passage through the diffuser/nozzle structures. The deformation of the microdroplet was captured using a level set method. On the experimental front, test devices were fabricated in polydimethylsiloxane using soft lithography. T-junctions for droplet formation, diffuser/nozzle structures and pressure ports were integrated in a single device. Mineral oil with 2% w/w surfactant span 80 and de-ionized water with fluorescent worked as the carrier phase and the dispersed phase, respectively. The deformation of the water droplet and the corresponding pressure drop across the diffuser/nozzle structures were measured in both diffuser and nozzle configurations at a fixed flow rate ratio between oil and water of 30. The results show a linear relationship between the pressure drop and the flow rate. Furthermore, the rectification effect was observed in all tested devices. The pressure drop in the diffuser configuration is higher than that of the nozzle configuration. Finally, the pressure measured results with droplet and without droplet were analyzed and compared.
dc.description.peerreviewedYes
dc.description.publicationstatusYes
dc.format.extent776477 bytes
dc.format.mimetypeapplication/pdf
dc.languageEnglish
dc.language.isoeng
dc.publisherSpringer
dc.publisher.placeGermany
dc.relation.ispartofstudentpublicationN
dc.relation.ispartofpagefrom835
dc.relation.ispartofpageto846
dc.relation.ispartofissue6
dc.relation.ispartofjournalMicrofluidics and Nanofluidics
dc.relation.ispartofvolume6
dc.rights.retentionY
dc.subject.fieldofresearchInterdisciplinary Engineering not elsewhere classified
dc.subject.fieldofresearchMechanical Engineering
dc.subject.fieldofresearchInterdisciplinary Engineering
dc.subject.fieldofresearchNanotechnology
dc.subject.fieldofresearchcode091599
dc.subject.fieldofresearchcode0913
dc.subject.fieldofresearchcode0915
dc.subject.fieldofresearchcode1007
dc.titleBehavior of microdroplets in diffuser/nozzle structures
dc.typeJournal article
dc.type.descriptionC1 - Articles
dc.type.codeC - Journal Articles
gro.rights.copyright© 2009 Springer Berlin Heidelberg. This is an electronic version of an article published in Microfluidics and Nanofluidics, Volume 6, Issue 6, pp 835-846, 2009. Microfluidics and Nanofluidics is available online at: http://link.springer.com/ with the open URL of your article.
gro.hasfulltextFull Text
gro.griffith.authorNguyen, Nam-Trung


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