Effects of a dynamic injection flow rate on slug generation in a cross-junction square microchannel
Qian, Jin Yuan LU
; Chen, Min-rui
; Wu, Zan
LU
; Jin, Zhi-jiang
and Sunden, Bengt
LU
(2019)
In Processes
7(10).
- Abstract
The injection flow rates of two liquid phases play a decisive role in the slug generation of the liquid-liquid slug flow. However, most injection flow rates so far have been constant. In order to investigate the effects of dynamic injection flow rates on the slug generation, including the slug size, separation distance and slug generation cycle time, a transient numerical model of a cross-junction square microchannel is established. The Volume of Fluid method is adopted to simulate the interface between two phases, i.e., butanol and water. The model is validated by experiments at a constant injection flow rate. Three different types of dynamic injection flow rates are applied for butanol, which are triangle, rectangular and sine wave... (More)
The injection flow rates of two liquid phases play a decisive role in the slug generation of the liquid-liquid slug flow. However, most injection flow rates so far have been constant. In order to investigate the effects of dynamic injection flow rates on the slug generation, including the slug size, separation distance and slug generation cycle time, a transient numerical model of a cross-junction square microchannel is established. The Volume of Fluid method is adopted to simulate the interface between two phases, i.e., butanol and water. The model is validated by experiments at a constant injection flow rate. Three different types of dynamic injection flow rates are applied for butanol, which are triangle, rectangular and sine wave flow rates. The dynamic injection flow rate cycles, which are related to the constant slug generation cycle time t0, are investigated. Results show that when the cycle of the disperse phase flow rate is larger than t0, the slug generation changes periodically, and the period is influenced by the cycle of the disperse phase flow rate. Among the three kinds of dynamic disperse flow rate, the rectangular wave influences the slug size most significantly, while the triangle wave influences the separation distance and the slug generation time more prominently.
(Less)
- author
- Qian, Jin Yuan
LU
; Chen, Min-rui
; Wu, Zan
LU
; Jin, Zhi-jiang
and Sunden, Bengt
LU
- organization
- publishing date
- 2019-10-18
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- Computational Fluid Dynamics, Dynamic injection flow rate, Liquid-liquid slug flow, Microchannel, Slug generation
- in
- Processes
- volume
- 7
- issue
- 10
- article number
- 765
- publisher
- MDPI AG
- external identifiers
-
- scopus:85074228769
- ISSN
- 2227-9717
- DOI
- 10.3390/pr7100765
- language
- English
- LU publication?
- yes
- id
- 65b62f2a-a1a9-407f-a6e9-1ea0c2418ec2
- date added to LUP
- 2019-11-21 13:07:57
- date last changed
- 2022-04-18 19:01:42
@article{65b62f2a-a1a9-407f-a6e9-1ea0c2418ec2,
abstract = {{<p>The injection flow rates of two liquid phases play a decisive role in the slug generation of the liquid-liquid slug flow. However, most injection flow rates so far have been constant. In order to investigate the effects of dynamic injection flow rates on the slug generation, including the slug size, separation distance and slug generation cycle time, a transient numerical model of a cross-junction square microchannel is established. The Volume of Fluid method is adopted to simulate the interface between two phases, i.e., butanol and water. The model is validated by experiments at a constant injection flow rate. Three different types of dynamic injection flow rates are applied for butanol, which are triangle, rectangular and sine wave flow rates. The dynamic injection flow rate cycles, which are related to the constant slug generation cycle time t<sub>0</sub>, are investigated. Results show that when the cycle of the disperse phase flow rate is larger than t<sub>0</sub>, the slug generation changes periodically, and the period is influenced by the cycle of the disperse phase flow rate. Among the three kinds of dynamic disperse flow rate, the rectangular wave influences the slug size most significantly, while the triangle wave influences the separation distance and the slug generation time more prominently.</p>}},
author = {{Qian, Jin Yuan and Chen, Min-rui and Wu, Zan and Jin, Zhi-jiang and Sunden, Bengt}},
issn = {{2227-9717}},
keywords = {{Computational Fluid Dynamics; Dynamic injection flow rate; Liquid-liquid slug flow; Microchannel; Slug generation}},
language = {{eng}},
month = {{10}},
number = {{10}},
publisher = {{MDPI AG}},
series = {{Processes}},
title = {{Effects of a dynamic injection flow rate on slug generation in a cross-junction square microchannel}},
url = {{http://dx.doi.org/10.3390/pr7100765}},
doi = {{10.3390/pr7100765}},
volume = {{7}},
year = {{2019}},
}