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Two-phase flow patterns in microfluidic cross-shaped junctions and slug hydrodynamics in the dripping regime

Wu, Zan LU ; Cao, Zhen LU and Sunden, Bengt LU (2017) ASME 2017 Heat Transfer Summer Conference, HT 2017 In Heat Transfer Equipment; Heat Transfer in Multiphase Systems; Heat Transfer Under Extreme Conditions; Nanoscale Transport Phenomena; Theory and Fundamental Research in Heat Transfer; Thermophysical Properties; Transport Phenomena in Materials Processing and Manufacturing 2.
Abstract

Flow patterns for water-butanol, water-toluene and waterhexane two-phase flows were visualized in the cross-shaped junctions of three square glass microchannels with hydraulic diameters of 200 μm, 400 μm and 600 μm. Typical flow pattern maps for water-butanol two-phase flow were developed based on Capillary number of the continuous phase and Weber number of the dispersed phase, and compared with a previous flow pattern map in the literature. Three main flow pattern groups were observed, including the tubing/threading regime group, the dripping regime and the jetting regime. The geometry confinement and fluid properties affected the viscous shear and interfacial tension forces and therefore their influence on flow pattern transitions was... (More)

Flow patterns for water-butanol, water-toluene and waterhexane two-phase flows were visualized in the cross-shaped junctions of three square glass microchannels with hydraulic diameters of 200 μm, 400 μm and 600 μm. Typical flow pattern maps for water-butanol two-phase flow were developed based on Capillary number of the continuous phase and Weber number of the dispersed phase, and compared with a previous flow pattern map in the literature. Three main flow pattern groups were observed, including the tubing/threading regime group, the dripping regime and the jetting regime. The geometry confinement and fluid properties affected the viscous shear and interfacial tension forces and therefore their influence on flow pattern transitions was clarified. Besides, in the dripping regime, the dimensionless slug length can be scaled as a function of the flow rate ratio and the Capillary number of the continuous phase.

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organization
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type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
in
Heat Transfer Equipment; Heat Transfer in Multiphase Systems; Heat Transfer Under Extreme Conditions; Nanoscale Transport Phenomena; Theory and Fundamental Research in Heat Transfer; Thermophysical Properties; Transport Phenomena in Materials Processing and Manufacturing
volume
2
publisher
American Society of Mechanical Engineers
conference name
ASME 2017 Heat Transfer Summer Conference, HT 2017
external identifiers
  • scopus:85032940831
ISBN
9780791857892
DOI
10.1115/HT2017-4734
language
English
LU publication?
yes
id
be88e570-7ed0-422c-9984-6cc1b7487ba7
date added to LUP
2017-11-16 09:03:06
date last changed
2018-01-07 12:25:53
@inproceedings{be88e570-7ed0-422c-9984-6cc1b7487ba7,
  abstract     = {<p>Flow patterns for water-butanol, water-toluene and waterhexane two-phase flows were visualized in the cross-shaped junctions of three square glass microchannels with hydraulic diameters of 200 μm, 400 μm and 600 μm. Typical flow pattern maps for water-butanol two-phase flow were developed based on Capillary number of the continuous phase and Weber number of the dispersed phase, and compared with a previous flow pattern map in the literature. Three main flow pattern groups were observed, including the tubing/threading regime group, the dripping regime and the jetting regime. The geometry confinement and fluid properties affected the viscous shear and interfacial tension forces and therefore their influence on flow pattern transitions was clarified. Besides, in the dripping regime, the dimensionless slug length can be scaled as a function of the flow rate ratio and the Capillary number of the continuous phase.</p>},
  author       = {Wu, Zan and Cao, Zhen and Sunden, Bengt},
  booktitle    = {Heat Transfer Equipment; Heat Transfer in Multiphase Systems; Heat Transfer Under Extreme Conditions; Nanoscale Transport Phenomena; Theory and Fundamental Research in Heat Transfer; Thermophysical Properties; Transport Phenomena in Materials Processing and Manufacturing},
  isbn         = {9780791857892},
  language     = {eng},
  publisher    = {American Society of Mechanical Engineers},
  title        = {Two-phase flow patterns in microfluidic cross-shaped junctions and slug hydrodynamics in the dripping regime},
  url          = {http://dx.doi.org/10.1115/HT2017-4734},
  volume       = {2},
  year         = {2017},
}