文献类型：期刊文献

英文题名：Slip Behavior and Morphological Change of Droplets on Vertically Crossed Fibers

作者：Lu, Zhaojin[1,2]; Zhang, Lian[2]; Wang, Zhiwen[2]; Shi, Chengcheng[1,2,3]; Yang, Hang[2]; Bai, Zhishan[2]

机构：[1] School of Chemical Engineering, East China University of Science and Technology, Shanghai, 200237, China; [2] School of Mechanical and Power Engineering, East China University of Science and Technology, Shanghai, 200237, China; [3] Changzhou University, China

年份：2024

外文期刊名：SSRN

收录：EI(收录号：20240269229)

语种：英文

外文关键词：Coalescence - Drop breakup - Emulsification - Emulsions - High speed cameras

摘要：Droplet capture and coalescence processes on vertically crossed fibers are critical for increasing droplet size and enhancing emulsion separation efficiency. In this paper, the movement behavior of oil droplets on vertically crossed fibers in a water environment were investigated using high-speed camera technology. Four sliding states (capture, detachment, coalescence-capture, and coalescence-detachment) and formation of secondary droplets were observed on the fiber intersections. The research shows that during the droplet capture process, droplets on large-diameter horizontal fiber exhibit greater lateral spreading, smaller vertical elongation, and larger deformation when stabilized. Increasing the diameter of horizontal fiber significantly shortens the capture time. Each combination of vertically crossed fibers corresponds to a unique critical volume of droplet capture, which gradually increases with the diameter of horizontal fiber. During the droplet coalescence process, the liquid bridge on large-diameter horizontal fiber is wider, and the droplet contraction ratio is smaller. Increasing the diameter of horizontal fiber promotes rapid fusion between droplets, but lipophobic fibers hinder the degree of fusion and deformation. Furthermore, the diameter and wettability of horizontal fiber on the intersections affect the volume of secondary droplets. During the capture process, the volume of secondary droplets increases with the diameter of horizontal fiber. During the coalescence process, the volume of secondary droplets on lipophilic horizontal fiber is approximately three times larger than that on lipophobic horizontal fiber. These findings contribute to understanding the details of coalescence separation and optimizing the design of fiber fillers. ? 2024, The Authors. All rights reserved.