文献类型：期刊文献

英文题名：Jet flow characteristics and flow regime transition of fluid on vertical fibers

作者：Lu, Zhaojin[1,2];Han, Qingling[2];Gu, Sheng[2];Wang, Lei[2];Zhang, Lian[2];Qin, Mengyao[2];Sun, Jianguo[2];Yang, Xiaoyong[2];Bai, Zhishan[2]

机构：[1]East China Univ Sci & Technol, Sch Chem Engn, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Sch Mech & Power Engn, Shanghai 200237, Peoples R China

年份：2026

卷号：380

外文期刊名：SEPARATION AND PURIFICATION TECHNOLOGY

收录：;EI(收录号：20253819192321);WOS:【SCI-EXPANDED(收录号:WOS:001575434400002)】；

基金：The research was sponsored by the National Science Fund for Distinguished Young Scholars, China (No. 22225804) and the National Natural Science Foundation of China, China (No.22408101) .

语种：英文

外文关键词：Jet flow; Flow regime transition; Eccentricity; Liquid film fluctuation; Empirical scaling analysis

摘要：The jet flow behavior of fluid along vertical fibers holds significant application value in industrial fields such as liquid-liquid extraction and coating deposition. In this study, high-speed camera and image processing technology were used to systematically investigate the flow behavior of oil phase on fiber surfaces in aqueous environment under varying nozzle diameter (Dn = 0.91-1.28 mm), fiber diameter (Df = 0-0.4 mm), and eccentricity (e = 0-1). The experimental results show that the three flow regimes are observed during the jet flow of droplets on the fiber, including isolated regime, Rayleigh-Plateau (RP) regime, and convective regime. Specifically, increasing the nozzle diameter from 0.91 to 1.28 mm can increase the critical flow rate between the three flow regimes and significantly broaden the RP regime interval by over 145 %. On the contrary, increasing the fiber diameter from 0 to 0.4 mm delays the transition between the three flow regimes, resulting in a narrowing of the RP regime interval by 33 %. Compared to non-eccentricity, a higher eccentricity (e = 1) both delays the isolated-to-RP transition and compresses the RP regime interval by 80 %. In addition, the droplet characteristic parameters and liquid film fluctuation characteristics are also significantly affected by nozzle-fiber system. Finally, an empirical correlation of the liquid film fluctuation period is established based on experimental data fitting, and the RP dynamic mechanism is revealed by force balance equations. These research results establish the theoretical foundation for the development of fiber-based liquid-liquid extractors, microfluidic devices, and coating deposition systems.