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dc.contributor.authorQin, Ning
dc.contributor.authorWen, John Z.
dc.contributor.authorRen, Carolyn L. 15:42:44 (GMT) 15:42:44 (GMT)
dc.description© 2017 American Physical Society,
dc.description.abstractThis is the first part of a two-part study on a partially miscible liquid-liquid flow (liquid carbon dioxide and deionized water) which is highly pressurized and confined in a microfluidic T-junction. Our main focuses are to understand the flow regimes as a result of varying flow conditions and investigate the characteristics of drop flow distinct from coflow, with a capillary number, Ca-c, that is calculated based on the continuous liquid, ranging from 10(-3) to 10(-2) (10(-4) for coflow). Here in part I, we present our experimental observation of drop formation cycle by tracking drop length, spacing, frequency, and after-generation speed using high-speed video and image analysis. The drop flow is chronologically composed of a stagnating and filling stage, an elongating and squeezing stage, and a truncating stage. The common "necking" time during the elongating and squeezing stage (with Ca-c similar to 10(-3)) for the truncation of the dispersed liquid stream is extended, and the truncation point is subsequently shifted downstream from the T-junction corner. This temporal postponement effect modifies the scaling function reported in the literature for droplet formation with two immiscible fluids. Our experimental measurements also demonstrate the drop speed immediately following their generations can be approximated by the mean velocity from averaging the total flow rate over the channel cross section. Further justifications of the quantitative analysis by considering the mass transfer at the interface of the two partially miscible fluids are provided in part II.en
dc.description.sponsorshipUniversity of Torontoen
dc.description.sponsorshipUniversity of Waterlooen
dc.publisherAmerican Physical Society (APS)en
dc.subjectsupercritical carbon-dioxideen
dc.subjectdroplet formationen
dc.subjectmicrofluidic deviceen
dc.subjectmultiphase microfluidicsen
dc.subjectshaped microchannelsen
dc.subjectbubble formationen
dc.subjectco2 diffusivityen
dc.subjectpore networken
dc.titleHighly pressurized partially miscible liquid-liquid flow in a micro-T-junction. I. Experimental observationsen
dcterms.bibliographicCitationQin, N., Wen, J. Z., & Ren, C. L. (2017). Highly pressurized partially miscible liquid-liquid flow in a micro-T-junction. I. Experimental observations. Physical Review E, 95(4). doi:10.1103/physreve.95.043110en
uws.contributor.affiliation1Faculty of Engineeringen
uws.contributor.affiliation2Mechanical and Mechatronics Engineeringen

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