Li Xinlong, He Liqun, Lv Song, Xu Chi, Qian Peng, Xie Fubo, Liu Minghou
Department of Thermal Science and Energy Engineering, University of Science and Technology of China Hefei 230027 China
RSC Adv. 2019 Jul 26;9(40):23229-23240. doi: 10.1039/c9ra03761f. eCollection 2019 Jul 23.
The effect of the slip lengths of both continuous and dispersed phases on droplet formation in microfluidic T-junctions is investigated by a volume of fluid method. Results reveal that, in a dripping regime, the droplet size is mainly influenced by the slip length of the continuous phase and increases with it. In a squeezing regime, the droplet size decreases with the slip lengths of both phases. The effects of the slip lengths of both phases on droplet generation are systematically discussed and summarized. The elongation rate of the thread can be decreased with an increase of slip lengths in both dripping and squeezing regimes, which is beneficial to improve droplet monodispersity. The monodispersity of droplets can deteriorate when the slip length of either phase is small and can be improved by increasing the slip length of the other phase.
采用流体体积法研究了连续相和分散相的滑移长度对微流控T型结中液滴形成的影响。结果表明，在滴状流型中，液滴尺寸主要受连续相滑移长度的影响，并随其增加而增大。在挤压流型中，液滴尺寸随两相的滑移长度减小。系统地讨论和总结了两相滑移长度对液滴生成的影响。在滴状流型和挤压流型中，随着滑移长度的增加，液柱的伸长率会降低，这有利于提高液滴的单分散性。当任一相的滑移长度较小时，液滴的单分散性会变差，而通过增加另一相的滑移长度可以改善液滴的单分散性。
