TY - JOUR

T1 - Experimental study of two-phase flow regimes in slit microchannels

AU - Ronshin, F. V.

AU - Dementyev, Yu A.

AU - Chinnov, E. A.

N1 - This work was financially supported by the Russian Science Foundation (grant no. 22-19-20090), https://rscf.ru/project/22-19-20090/ and the Government of the Novosibirsk Region, Agreement no. P-13.

PY - 2023/4

Y1 - 2023/4

N2 - A two-phase flow in flat minichannels and microchannels with a height range of 50–1 mm and width range of 10–40 mm was experimentally investigated. The flow regimes were determined and regime maps were constructed. The characteristics of two-phase flows have been studied using laser-induced fluorescence and Schlieren methods. Transitions between two-phase flows and their formation have been investigated. Based on the developed methodology, criteria that accurately determine the boundaries between the two-phase flow regimes have been created. The two-phase flow regimes in microchannels were compared with theoretical models. For the Taitel and Dukler and Ullmann and Brauner models, an algorithm that calculates the regime maps for the given channel parameters was derived. It was shown that the Ullmann and Brauner model predicts quite well the transition to the stratified and annular regimes in channels with cross-sections of 0.05 × 20 mm2 and 0.05 × 40 mm2. Regularities of the channel width influence on the transition to the annular regime were revealed. A criterion for the transition from the stratified to the annular regime, based on the discovered fact of liquid jet structuring along the channel, has been proposed.

AB - A two-phase flow in flat minichannels and microchannels with a height range of 50–1 mm and width range of 10–40 mm was experimentally investigated. The flow regimes were determined and regime maps were constructed. The characteristics of two-phase flows have been studied using laser-induced fluorescence and Schlieren methods. Transitions between two-phase flows and their formation have been investigated. Based on the developed methodology, criteria that accurately determine the boundaries between the two-phase flow regimes have been created. The two-phase flow regimes in microchannels were compared with theoretical models. For the Taitel and Dukler and Ullmann and Brauner models, an algorithm that calculates the regime maps for the given channel parameters was derived. It was shown that the Ullmann and Brauner model predicts quite well the transition to the stratified and annular regimes in channels with cross-sections of 0.05 × 20 mm2 and 0.05 × 40 mm2. Regularities of the channel width influence on the transition to the annular regime were revealed. A criterion for the transition from the stratified to the annular regime, based on the discovered fact of liquid jet structuring along the channel, has been proposed.

KW - Flow regimes

KW - LIF method

KW - Schlieren method

KW - Slit microchannel

KW - Two-phase flow

UR - https://www.scopus.com/record/display.uri?eid=2-s2.0-85150681865&origin=inward&txGid=60be2c0e699926c85d7d7097b78a3c2b

UR - https://www.mendeley.com/catalogue/ec96d715-4813-3b4a-8b57-dfe336f95645/

U2 - 10.1007/s10404-023-02633-8

DO - 10.1007/s10404-023-02633-8

M3 - Article

VL - 27

JO - Microfluidics and Nanofluidics

JF - Microfluidics and Nanofluidics

SN - 1613-4982

IS - 4

M1 - 24

ER -