文献类型：期刊文献

英文题名：Investigation of the Microscopic Process of the Media Coalescence Treatment of Water-in-Oil Emulsion

作者：Meng, Min[1,2];Yang, Qiang[1]

机构：[1]East China Univ Sci & Technol, Sch Mech & Power Engn, Shanghai 200237, Peoples R China;[2]China Aerodynam Res & Dev Ctr, Computat Aerodynam Inst, Mianyang 621000, Peoples R China

年份：2023

卷号：8

期号：13

起止页码：11908

外文期刊名：ACS OMEGA

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000971531100001)】；

基金：ACKNOWLEDGMENTS This work is supported by the National Natural Science Foundation of China (Grant No. 52000072) .

语种：英文

摘要：Medium coalescence technology is a research hotspot for the separation of oil-in-water emulsions. However, the coalescence mechanism is still unclear, making it challenging to effectively improve the separation performance. Herein, the microscopic mechanism of medium coalescence was revealed. We found that the effective collision positions under the action of the flow field include the exposed granule surface, adherent droplet surface, and three-phase contact line. Furthermore, a numerical model of the microscopic process of water-in-oil emulsion permeation through a granular bed was established. The effects of different parameters (including the number of medium layers, Reynolds number, and inlet concentration) on the microscopic process of capturing dispersed-phase droplets in the bed and the pressure drop in the coalescence area were studied. The numerical results show that the droplets form the bridging structure between the granules. On the one hand, the bridging structure promotes the capture of the droplets by the bed; on the other hand, it causes pressure-drop fluctuations in the coalescence area and asymmetric distribution of the velocity field. [GRAPHICS] .