Numerical Simulation of Droplet Generation in Cross-Junction Microchannel under Changing Dispersion Phase Velocities
Chen, Min Rui ; Qian, Jin Yuan LU
; Li, Xiao Juan
and Jin, Zhi Jiang
(2018)
In Gao Xiao Hua Xue Gong Cheng Xue Bao/Journal of Chemical Engineering of Chinese Universities
32(3).
p.522-528
- Abstract
Micro-droplets with excellent physical properties and size effects are widely used in different fields. Peristaltic pumps are often used for droplet generation. The thrust force of pumps is periodic as a periodic disturbance when the time scale is short enough. Numerical simulation based on a validated model was applied to study the periodic disturbance effects on droplet generation in a cross-junction microchannel. A volume of fluid (VOF) method was adopted with the continuous phase of silicon oil and the disperse phase of water. When the velocity of the continuous and dispersed phases is both 0.01 m∙s-1, the droplet generation time is 0.08 s. Sine functions with cycles of 0.04, 0.08, 0.12 and 0.16 s and amplitudes of... (More)
Micro-droplets with excellent physical properties and size effects are widely used in different fields. Peristaltic pumps are often used for droplet generation. The thrust force of pumps is periodic as a periodic disturbance when the time scale is short enough. Numerical simulation based on a validated model was applied to study the periodic disturbance effects on droplet generation in a cross-junction microchannel. A volume of fluid (VOF) method was adopted with the continuous phase of silicon oil and the disperse phase of water. When the velocity of the continuous and dispersed phases is both 0.01 m∙s-1, the droplet generation time is 0.08 s. Sine functions with cycles of 0.04, 0.08, 0.12 and 0.16 s and amplitudes of 0.0025, 0.005, 0.0075 and 0.01 were imported as the inlet velocity of the disperse phase. Droplet sizes and generation times were obtained by simulating different flow processes. The results show that when the cycle is less than 0.08 s, changes of cycle time and amplitude have few effects on droplet size and generation time. However, when the cycle time is larger than 0.08 s, droplet size and generation time change periodically. Furthermore, amplitude has few effects on droplet generation.
(Less)
- author
- Chen, Min Rui
; Qian, Jin Yuan
LU
; Li, Xiao Juan
and Jin, Zhi Jiang
- organization
- publishing date
- 2018-06-01
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- Inlet veloctiy, Micro-droplet, Microchannel, Two-phase flow, VOF
- in
- Gao Xiao Hua Xue Gong Cheng Xue Bao/Journal of Chemical Engineering of Chinese Universities
- volume
- 32
- issue
- 3
- pages
- 7 pages
- publisher
- Zhejiang University Press
- external identifiers
-
- scopus:85050893393
- ISSN
- 1003-9015
- DOI
- 10.3969/j.issn.1003-9015.2018.03.005
- language
- English
- LU publication?
- yes
- id
- bc295cd1-0697-4ca9-927a-99f93e46db52
- alternative location
- http://en.cnki.com.cn/Article_en/CJFDTotal-GXHX201803005.htm
- date added to LUP
- 2018-09-10 14:59:38
- date last changed
- 2022-04-02 01:57:58
@article{bc295cd1-0697-4ca9-927a-99f93e46db52,
abstract = {{<p>Micro-droplets with excellent physical properties and size effects are widely used in different fields. Peristaltic pumps are often used for droplet generation. The thrust force of pumps is periodic as a periodic disturbance when the time scale is short enough. Numerical simulation based on a validated model was applied to study the periodic disturbance effects on droplet generation in a cross-junction microchannel. A volume of fluid (VOF) method was adopted with the continuous phase of silicon oil and the disperse phase of water. When the velocity of the continuous and dispersed phases is both 0.01 m∙s<sup>-1</sup>, the droplet generation time is 0.08 s. Sine functions with cycles of 0.04, 0.08, 0.12 and 0.16 s and amplitudes of 0.0025, 0.005, 0.0075 and 0.01 were imported as the inlet velocity of the disperse phase. Droplet sizes and generation times were obtained by simulating different flow processes. The results show that when the cycle is less than 0.08 s, changes of cycle time and amplitude have few effects on droplet size and generation time. However, when the cycle time is larger than 0.08 s, droplet size and generation time change periodically. Furthermore, amplitude has few effects on droplet generation.</p>}},
author = {{Chen, Min Rui and Qian, Jin Yuan and Li, Xiao Juan and Jin, Zhi Jiang}},
issn = {{1003-9015}},
keywords = {{Inlet veloctiy; Micro-droplet; Microchannel; Two-phase flow; VOF}},
language = {{eng}},
month = {{06}},
number = {{3}},
pages = {{522--528}},
publisher = {{Zhejiang University Press}},
series = {{Gao Xiao Hua Xue Gong Cheng Xue Bao/Journal of Chemical Engineering of Chinese Universities}},
title = {{Numerical Simulation of Droplet Generation in Cross-Junction Microchannel under Changing Dispersion Phase Velocities}},
url = {{http://dx.doi.org/10.3969/j.issn.1003-9015.2018.03.005}},
doi = {{10.3969/j.issn.1003-9015.2018.03.005}},
volume = {{32}},
year = {{2018}},
}