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http://dx.doi.org/10.5407/jksv.2020.18.3.116

Numerical study on pressure drop with moving contact lines of dry slug flow in a hydrophobic minichannel  

Jeon, Jun Ho (Department of Mechanical Design Engineering, Graduated school of Pukyong National University)
Park, Su Chung (Research Institute of Industrial Science and Technology, Pukyong National University)
Yu, Dong In (Department of Mechanical Design Engineering, Pukyong National University)
Kim, Tae Hun (Research Institute of Industrial Science and Technology, Pukyong National University)
Lee, Yeon Won (Department of Mechanical Design Engineering, Pukyong National University)
Publication Information
Journal of the Korean Society of Visualization / v.18, no.3, 2020 , pp. 116-121 More about this Journal
Abstract
In this study, a single-phase analysis of droplet slug with different contact angles was performed based on the visualization of experimental results. Droplet slug - flowing between gases in a hydrophobic mini channel - moves with a triple contact line without a gas liquid film on the wall. The results show that the rotational flow inside the droplet occurred; this was compared and verified with the results of two-phase analysis. The pressure field shows pressure rise at the front and rear ends. The effective length - the section that satisfies the laminar flow condition - became shorter as the droplet velocity increased. The Choi's correlation for the effective length agrees with this analysis results with a slight difference. This difference is judged as the difference in the contact angle of the slug model.
Keywords
Slug flow; Hydrophobic minichannel; CFD; Effective length;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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