文献类型：期刊文献

英文题名：One-dimensional drift-flux model for two-phase flow in NaCl solutions: The role of surface mobility

作者：Zhang, Hao[1];Yang, Haiqiang[1];Chen, Zhengjun[1];Yuan, Fang[1];Yang, Qiang[1];Liu, Bo[1]

机构：[1]East China Univ Sci & Technol, Dept Mech & Power Engn, 130 Meilong Rd,Lingyunlu St, Shanghai, Peoples R China

年份：2023

卷号：167

外文期刊名：INTERNATIONAL JOURNAL OF MULTIPHASE FLOW

收录：;EI(收录号：20232614327661);WOS:【SCI-EXPANDED(收录号:WOS:001029757500001)】；

基金：This work was financially supported by the National Natural Science Foundation of China (Nos. 22178099, 52025103) , the Open Project of State Key Laboratory of Chemical Engineering (SKL-ChE-22C02) , the Shanghai Natural Science Foundation (21ZR1417000) Shanghai Pujiang Program (21PJ1402000) , and the Special Project for Peak Carbon Di-oxide Emissions-Carbon Neutrality (21DZ1207800) from the Shanghai Municipal Science and Technology Commission. Bo Liu acknowledges Dr. Xu Xiao and Mr. Wang Wei on the assistance on experimental setup. The authors would like to thank ChatGPT for improving the language.

语种：英文

外文关键词：Drift-flux; Bubble column; Surface mobility; Gas holdup; Microbubble

摘要：The presence of dissolved salts in water inhibits bubble coalescence, facilitating the generation of microbubbles, while also maintaining a tangentially mobile air-water surface. In this study, we investigated the variation of bubble size and gas holdup with gas velocity in NaCl solutions using a rectangular bubble column and interpreted the experimental data using the one-dimensional drift-flux model. For the generated bubbles at the size between 0.4 mm and 1 mm, we found that the Moore model assumes mobile air-water surfaces, rather than the Schiller and Naumann model, should be used to describe the bubble terminal velocity. The latter model, which assumes an immobile air-water surface, has been used successfully to predict two-phase flow in surfactant solutions but would overestimate the gas holdup by almost 100 % for NaCl solutions. This finding emphasizes the crucial role of surface mobility in determining gas holdup. Thus, we propose the use of a one-dimensional drift-flux model, incorporating the Moore model to describe bubble terminal velocity, for microbubble systems with a mobile air water interface.