文献类型：期刊文献

英文题名：Effect of bubble size on bubble rising velocity and stagnation in a granular bed

作者：Zhang, Yingchun[1];Wang, Wei[1];Xu, Xiao[1];Yang, Qiang[1]

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

年份：2022

卷号：12

外文期刊名：CHEMICAL ENGINEERING JOURNAL ADVANCES

收录：EI(收录号：20220407328);WOS:【ESCI(收录号:WOS:001077068100001)】；

基金：The authors wish to express their sincere gratitude to the National Key R&D Program of China (2018YFC1801904, 2018YFC1802704), National Natural Science Foundation of China (51678238, 51722806, 21908057), and Shanghai Sailing Program (19YF1411800) for financial support. This project was also sponsored by "Chenguang Program" supported by Shanghai Education Development Foundation and Shanghai Municipal Education Commission (20CG39).

语种：英文

外文关键词：Granular bed; Stagnation; Bubble behavior; Bubble size

摘要：The hydrodynamics of gas and liquid flow through a granular bed were proposed in this work. By introducing optical principles, a high-speed camera was used to capture bubbles at different heights in a granular bed. The effect of bubble size on the rising velocity and stagnation of bubble was investigated. The results showed that bubble rose along a non-uniform trajectory. The average rising velocity increased nonlinearly with the increase of the initial bubble diameter. This work also provides a visual verification that multiple bubbles stagnation occurs. The results show that the rising velocity and bubble size were the two key factors, which dominate the stagnation probability. The rising velocity of multiple bubbles is expressed by the overall velocity, as well as the bubble size is expressed by the projected area, which is found the bubble projection area and the overall velocity of the bubbles were negatively correlated with the stagnation.