TY - JOUR

T1 - Determination of the transition boundary between segmented and continuous flow patterns in microfluidic liquid-liquid flows using dimensional analysis

AU - Kovalev, A. V.

AU - Yagodnitsyna, A. A.

AU - Bilsky, A. V.

N1 - Funding Information: Research was financially supported by the Russian Foundation for Basic Research in the framework of science project No. 19-38-90175 “Post-graduates”. Experimental data for analysis were obtained in the framework of Presidential Grant MK-1230.2021.4. Experimental setup and equipment were purchased due to the state program for ITP SB RAS. Publisher Copyright: © 2021, Nauka/Interperiodica.

PY - 2021/11

Y1 - 2021/11

N2 - 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 = μd/μc 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.

AB - 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 = μd/μc 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.

KW - dimensional analysis

KW - flow patterns

KW - liquid-liquid flow

KW - microchannel

UR - http://www.scopus.com/inward/record.url?scp=85126533610&partnerID=8YFLogxK

UR - https://www.mendeley.com/catalogue/62c9e2e4-2a14-3607-8187-cffa17d62fca/

U2 - 10.1134/S086986432106007X

DO - 10.1134/S086986432106007X

M3 - Article

AN - SCOPUS:85126533610

VL - 28

SP - 827

EP - 833

JO - Thermophysics and Aeromechanics

JF - Thermophysics and Aeromechanics

SN - 0869-8643

IS - 6

M1 - 7

ER -