Determination of the transition boundary between segmented and continuous flow patterns in microfluidic liquid-liquid flows using dimensional analysis

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Abstract

Microfluidic liquid-liquid flows exhibit a wide range of different flow patterns. The most important point in practical applications is the transition from the segmented to the continuous flow patterns, as well as the prediction of this transition for an arbitrary combination of fluids. This paper presents a detailed analysis of the existing experimental data on flow patterns of immiscible liquids and provides data generalization through dimensional analysis. It is shown that the previously proposed criterion (We0.4Oh0.6) composed from Weber and Ohnesorge numbers provides a prediction on transition continuous-to-segmented flow with good accuracy if viscosity ratio λ = μdc is less than unity. For the viscosity ratio λ > 1, this criterion ceases to work, and additional experimental data are required to construct a generalizing parameter for microfluidic flow in such systems.

Translated title of the contributionОпределение границы перехода между сегментированными и непрерывными режимами течения в микроканальных потоках жидкость-жидкость на основе критериев подобия
Original languageEnglish
Article number7
Pages (from-to)827-833
Number of pages7
JournalThermophysics and Aeromechanics
Volume28
Issue number6
DOIs
Publication statusPublished - Nov 2021

Keywords

  • dimensional analysis
  • flow patterns
  • liquid-liquid flow
  • microchannel

OECD FOS+WOS

  • 1.07 OTHER NATURAL SCIENCES
  • 1.01 MATHEMATICS
  • 2.03 MECHANICAL ENGINEERING

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