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Fluid behavior of supercritical carbon dioxide with water in a double-Y-channel microfluidic chip
Uppsala University.
Uppsala University.
Uppsala University.
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2014 (Engelska)Ingår i: Microfluidics and Nanofluidics, ISSN 1613-4982, E-ISSN 1613-4990, Vol. 17, nr 6, s. 1105-1112Artikel i tidskrift (Refereegranskat) Published
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Abstract [en]

The use of supercritical carbon dioxide (scCO(2)) as an apolar solvent has been known for decades. It offers a greener approach than, e.g., hexane or chloroform, when such solvents are needed. The use of scCO(2) in microsystems, however, has only recently started to attract attention. In microfluidics, the flow characteristics need to be known to be able to successfully design such components and systems. As supercritical fluids exhibit the exciting combination of low viscosity, high density, and high diffusion rates, the fluidic behavior is not directly transferrable from aqueous systems. In this paper, three flow regimes in the scCO(2)-liquid water two-phase microfluidic system have been mapped. The effect of both total flow rate and relative flow rate on the flow regime is evaluated. Furthermore, the droplet dynamics at the bifurcating exit channel are analyzed at different flow rates. Due to the low viscosity of scCO(2), segmented flows were observed even at fairly high flow rates. Furthermore, the carbon dioxide droplet behavior exhibited a clear dependence on both flow rate and droplet length.

Ort, förlag, år, upplaga, sidor
2014. Vol. 17, nr 6, s. 1105-1112
Nyckelord [en]
Two-phase flow, Segmented flow, Parallel flow, Wavy flow, Droplet dynamics
Nationell ämneskategori
Nanoteknik Fusion, plasma och rymdfysik
Identifikatorer
URN: urn:nbn:se:sh:diva-30162DOI: 10.1007/s10404-014-1399-6ISI: 000345389900014Scopus ID: 2-s2.0-84912091166OAI: oai:DiVA.org:sh-30162DiVA, id: diva2:932459
Tillgänglig från: 2015-01-09 Skapad: 2016-06-01 Senast uppdaterad: 2017-11-30Bibliografiskt granskad

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Do-Quang, MinhAmberg, Gustav

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Microfluidics and Nanofluidics
NanoteknikFusion, plasma och rymdfysik

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