文献类型：期刊文献

英文题名：Hydrodynamic characteristics of the two-phase flow field at gas-evolving electrodes: numerical and experimental studies

作者：Liu, Cheng-Lin[1];Sun, Ze[1];Lu, Gui-Min[1];Yu, Jian-Guo[1,2]

机构：[1]East China Univ Sci & Technol, Natl Engn Res Ctr Integrated Utilizat Salt Lake R, Shanghai, Peoples R China;[2]East China Univ Sci & Technol, State Key Lab Chem Engn, Shanghai, Peoples R China

年份：2018

卷号：5

期号：5

外文期刊名：ROYAL SOCIETY OPEN SCIENCE

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000433498000007)】；

基金：We acknowledge the financial support of the National Natural Science Foundation of China (grant nos. 51504099 and U1407202) and Qinghai Science and Technology Department (grant no. 2015-GX-Q19A).

语种：英文

外文关键词：computational fluid dynamics; experimental; measurements; gas-evolving electrodes; particle image velocimetry; volumetric three-component velocimetry

摘要：Gas-evolving vertical electrode system is a typical electrochemical industrial reactor. Gas bubbles are released from the surfaces of the anode and affect the electrolyte flow pattern and even the cell performance. In the current work, the hydrodynamics induced by the air bubbles in a cold model was experimentally and numerically investigated. Particle image velocimetry and volumetric three-component velocimetry techniques were applied to experimentally visualize the hydrodynamics characteristics and flow fields in a two-dimensional (2D) plane and a three-dimensional (3D) space, respectively. Measurements were perfonned at different gas rates. Furthermore, the corresponding mathematical model was developed under identical conditions for the qualitative and quantitative analyses. The experimental measurements were compared with the numerical results based on the mathematical model. The study of the time averaged flow field, three velocity components, instantaneous velocity-and turbulent intensity indicate that the numerical model qualitatively reproduces liquid motion. The 3D model predictions capture the flow behaviour more accurately than the 2D model in this stud V.