Breakup dynamics of gas-liquid interface during Taylor bubble formation in a microchannel flow-focusing device

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Bibtex

@article{fe9acecb70cc4f6fa2424af248c50158,
title = "Breakup dynamics of gas-liquid interface during Taylor bubble formation in a microchannel flow-focusing device",
abstract = "This work aims to investigate the breakup dynamics of the gas-liquid interface during bubble formation in a microchannel flow-focusing device. An interface tracking method is developed to capture the profiles of the gaseous thread evolution. The results show that the pinch-off period can be further divided into a liquid squeezing stage and a free pinch-off stage in both the radial and axial directions. The time domain criterion between these two stages in a low viscous liquid, with Ohnesorge numbers Oh≪1, is proved to be shorter than the capillary time. The effects of surface tension, viscosity and gas inertial force exerting on the interface during the free pinch-off stage are proved similar to those in a quiescent liquid pool. The power law of the minimum diameter at the gaseous thread to the pinch-off remaining time in the present experiments agrees with previous studies in both ranges (1/3 to 1/2) and tendency.",
keywords = "Confinement, Interface, Microfluidics, Multiphase flow, Nonlinear dynamics, Pinch-off",
author = "Xingchen Li and Yiyong Huang and Xiaoqian Chen and Bengt Sunden and Zan Wu",
year = "2020",
month = "5",
day = "1",
doi = "10.1016/j.expthermflusci.2020.110043",
language = "English",
volume = "113",
journal = "Experimental Thermal and Fluid Science",
issn = "1879-2286",
publisher = "Elsevier",

}