Breakup dynamics of gas-liquid interface during Taylor bubble formation in a microchannel flow-focusing device
(2020) In Experimental Thermal and Fluid Science 113.- 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... (More)
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.
(Less)
- author
- Li, Xingchen LU ; Huang, Yiyong ; Chen, Xiaoqian ; Sunden, Bengt LU and Wu, Zan LU
- organization
- publishing date
- 2020-05-01
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- Confinement, Interface, Microfluidics, Multiphase flow, Nonlinear dynamics, Pinch-off
- in
- Experimental Thermal and Fluid Science
- volume
- 113
- article number
- 110043
- publisher
- Elsevier
- external identifiers
-
- scopus:85078098782
- ISSN
- 0894-1777
- DOI
- 10.1016/j.expthermflusci.2020.110043
- language
- English
- LU publication?
- yes
- id
- fe9acecb-70cc-4f6f-a242-4af248c50158
- date added to LUP
- 2020-02-04 09:43:18
- date last changed
- 2023-11-19 22:32:23
@article{fe9acecb-70cc-4f6f-a242-4af248c50158,
abstract = {{<p>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.</p>}},
author = {{Li, Xingchen and Huang, Yiyong and Chen, Xiaoqian and Sunden, Bengt and Wu, Zan}},
issn = {{0894-1777}},
keywords = {{Confinement; Interface; Microfluidics; Multiphase flow; Nonlinear dynamics; Pinch-off}},
language = {{eng}},
month = {{05}},
publisher = {{Elsevier}},
series = {{Experimental Thermal and Fluid Science}},
title = {{Breakup dynamics of gas-liquid interface during Taylor bubble formation in a microchannel flow-focusing device}},
url = {{http://dx.doi.org/10.1016/j.expthermflusci.2020.110043}},
doi = {{10.1016/j.expthermflusci.2020.110043}},
volume = {{113}},
year = {{2020}},
}