期刊
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
卷 491, 期 -, 页码 70-77出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.colsurfa.2015.11.059
关键词
Coalescence; Membrane; Oil-in-water-emulsion; Computational fluid dynamics; CLSVOF
资金
- Japan Society for the Promotion of Science (JSPS)
- Regional Innovation Strategy Support Program from Ministry of Education, Culture, Sports, Science and Technology, Japan
- Grants-in-Aid for Scientific Research [26820339] Funding Source: KAKEN
We numerically investigated the demulsification phenomena of oil-in-water (O/W) emulsions using a membrane coalescence process. We simulated the permeation of O/W emulsions through a membrane with a single straight pore using our numerical framework based on the coupled level set and volume-of-fluid (CLSVOF) method. With a low droplet volume fraction, small droplets, and a large pore size, the oil droplets frequently passed through the membrane without attaching to its surface. After the steady coalescence of the droplets on the membrane surface at the permeation side, large oil droplets could be obtained. With a higher droplet volume fraction, larger oil droplets, and smaller membrane pores, the oil droplets easily blocked the membrane pores and were thus forced away by the permeating flow, which yielded relatively small oil droplets. Our numerical work revealed the fundamental dynamics of the coalescence of oil droplets in an O/W emulsion using a simple membrane model. (C) 2015 Elsevier B.V. All rights reserved.
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