文献类型：期刊文献

英文题名：Mechanistic insights into oil droplet detachment from fibers for optimizing oil-water separation coalescers

作者：Gu, Sheng[1];Pei, Longyao[1];Zhang, Lian[1];Zhang, Weijie[1];Lu, Zhaojin[1];Bai, Zhishan[1];Zhang, Hongbo[1]

机构：[1]East China Univ Sci & Technol, Sch Mech & Power Engn, Shanghai 200237, Peoples R China

年份：2026

卷号：298

外文期刊名：WATER RESEARCH

收录：;EI(收录号：20261420422991);WOS:【SCI-EXPANDED(收录号:WOS:001737918400001)】；

基金：The research was supported by the National Science Fund for Distinguished Young Scholars, China (No.22225804) , the National Natural Science Foundation of China, China (No.22408101) and Inno-vation Program of Shanghai Municipal Education Commission (2023ZKZD38) .

语种：英文

外文关键词：Oil-water separation; Coalescer; Drag force; Fibers; Droplet detachment model

摘要：The effective treatment of oily wastewater is of great significance for protecting water resources and ecosystems. Fiber coalescers enable effective oil-water separation by inducing the coalescence and growth of small oil droplets in sewage. However, the mechanism of droplet detachment from coalescence fibers remains unclear, which severely limits the improvement of the oil-water separation performance. In this article, the droplet detachment process from the fibers in a shear flow is investigated using high-speed camera technology and a novel mechanical model is proposed to analyze the force variation during the detachment process. The results indicate that a droplet on fibers begins to slide or detach when the drag force of water flow exceeds the maximum detachment resistance force which is governed by the diameter and arrangement of the fibers, droplet volume, and surface tension. A droplet on the crossing fibers detaches along the fiber with the minimum detachment resistance force. The drag coefficient of water flow in the fiber-droplet system is derived through force balance analysis and experiment. The minimum flow rate for the droplet detachment can be predicted by the proposed model which considers the effect of three-phase contact line change, which shows good consistency with experimental data. An optimization strategy and application case for oil-water separation coalescers are proposed based on the presented model. The proposed mechanical model provides novel theoretical support for the design of high-efficiency oil-water separation coalescers, offering substantial research value and application potential for wastewater treatment in industry.