Two-phase flow patterns in short horizontal rectangular microchannels

E. A. Chinnov, F. V. Ron'shin, O. A. Kabov

Research output: Contribution to journalArticle

21 Citations (Scopus)

Abstract

The two-phase flow in a short horizontal channel of a rectangular cross-section with the height of 100-500 μm and width of 9-40 mm was studied experimentally. The use of the Schliren and fluorescent methods made it possible to reveal the flow of liquid in the channel and to determine its characteristics quantitatively. The features of the churn, jet and drop flow patterns were studied in details. Two particular regimes that can be distinguished represent formation of immobile drops on the channel walls because of the liquid film or liquid bridges breakage and appearance of mobile drops due to the two-phase flow instabilities. It is found out that formation of various two-phase flow patterns and transitions between them are determined by instabilities of the liquid-gas flow in the side parts of a channel. Frontal instability has been observed during the liquid-gas interaction in the region of liquid output from the nozzle. It is shown that a change in the height and width of the horizontal channels has a substantial effect on the boundaries between the flow regimes. One of the results is that the region of the churn regime increases significantly with decreasing thickness of the channel.

Original languageEnglish
Pages (from-to)57-68
Number of pages12
JournalInternational Journal of Multiphase Flow
Volume80
DOIs
Publication statusPublished - 1 Apr 2016

Fingerprint

two phase flow
microchannels
Microchannels
Two phase flow
Flow patterns
flow distribution
Liquids
liquids
gas-liquid interactions
Liquid films
liquid bridges
Flow of gases
Flow of fluids
Nozzles
jet flow
Gases
nozzles
gas flow
output
cross sections

Keywords

  • Flow pattern
  • Short horizontal rectangular microchannel
  • Two-phase flow instability

ASJC Scopus subject areas

  • Mechanical Engineering
  • Physics and Astronomy(all)
  • Fluid Flow and Transfer Processes

Cite this

Two-phase flow patterns in short horizontal rectangular microchannels. / Chinnov, E. A.; Ron'shin, F. V.; Kabov, O. A.

In: International Journal of Multiphase Flow, Vol. 80, 01.04.2016, p. 57-68.

Research output: Contribution to journalArticle

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