期刊
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
卷 59, 期 22, 页码 10298-10307出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.iecr.0c00803
关键词
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资金
- National Nature Science Foundation of China [21978197, 91834303, 21776200]
- Opening Project of State Key Laboratory of Chemical Engineering of China [SKL-ChE17B02]
Droplet coalescence in a novel funnel-typed expansion chamber in the T-junction microchannel was visually investigated to improve and precisely control droplet coalescence. Three types of coalescence regimes were observed: noncoalescence, two-droplet coalescence, and multiple coalescence. For two-droplet coalescence, three subtypes were observed: slipping coalescence, colliding coalescence, and squeezing coalescence. The different trajectories of the two droplets in the three subtypes and the influences of the two-phase flow rate and the length-to-width ratio of the expansion chamber on the coalescence percentage for two-droplet coalescence were studied systematically. The results indicate that the coalescence percentage increases first and then declines with the increase of a continuous phase flow rate or the decrease of the dispersed phase flow rate. Under a lower continuous phase flow rate, the coalescence percentage rises with an increasing length-to-width ratio of the chamber, while an inverse trend was found in the higher continuous phase flow rate.
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