A conceptual model for analyzing particle effects on gas-liquid flows in slurry bubble columns | |
Zhou, Rongtao1,2,3; Yang, Ning1,2; Li, Jinghai1,2 | |
刊名 | POWDER TECHNOLOGY |
2020-04-01 | |
卷号 | 365页码:28-38 |
关键词 | Cfd Bubble Column Drag Mesoscale Multiphase Flow |
ISSN号 | 0032-5910 |
DOI | 10.1016/j.powtec.2019.03.025 |
英文摘要 | Particles play significant roles in the flow structure of gas-liquid flows in slurry bubble columns. The Dual-Bubble-Size (DBS) model based on the Energy-Minimization Multi-Scale (EMMS) approach has been developed to characterize gas-liquid flows by incorporating a stability condition in our previous work. A Particle-dependent Dual-Bubble-Size (PDBS) model is thereby developed in this work to analyze the different particle effects on gas-liquid flows. The particle effects on apparent properties of liquid phase and drag coefficients of bubbles are considered for systems of wettable particles. The model calculation indicates that the regime transition is delayed due to the increase of apparent density and viscosity. On the other hand, the particle effect on bubble drag coefficients decrease the gas holdup. The PDBS model taking account of both the effects can reproduce the decrease of gas holdup and energy consumption of bubble breakage arising from the increase of solid concentration. A new drag model is then derived from the PDBS model for CFD modeling. The CFD predictions of gas distribution under high solid loadings are in conformity with experimental data. The particle effect on stabilizing bubble surface is also analyzed for systems of non-wettable particles. The model reflects the increase of gas holdup with addition of non-wettable particles, and reveals also that small bubbles may dominate the system in such cases. (C) 2019 Elsevier B.V. All rights reserved. |
资助项目 | National Key Research and Development Program of China[2017YFE0106500] ; National Natural Science Foundation of China[91834303] ; National Natural Science Foundation of China[91634203] |
WOS关键词 | Solid Flow ; Stability Condition ; Regime Transition ; Multiscale Method ; Cfd Simulation ; Scale-up ; Holdup ; Behavior ; Coefficient ; Coalescence |
WOS研究方向 | Engineering |
语种 | 英语 |
出版者 | ELSEVIER |
WOS记录号 | WOS:000528265800004 |
资助机构 | National Key Research and Development Program of China ; National Natural Science Foundation of China |
内容类型 | 期刊论文 |
源URL | [http://ir.ipe.ac.cn/handle/122111/40337] |
专题 | 中国科学院过程工程研究所 |
通讯作者 | Yang, Ning |
作者单位 | 1.Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, Beijing 100190, Peoples R China 2.Chinese Acad Sci, Inst Proc Engn, Ctr Mesosci, Beijing 100190, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China |
推荐引用方式 GB/T 7714 | Zhou, Rongtao,Yang, Ning,Li, Jinghai. A conceptual model for analyzing particle effects on gas-liquid flows in slurry bubble columns[J]. POWDER TECHNOLOGY,2020,365:28-38. |
APA | Zhou, Rongtao,Yang, Ning,&Li, Jinghai.(2020).A conceptual model for analyzing particle effects on gas-liquid flows in slurry bubble columns.POWDER TECHNOLOGY,365,28-38. |
MLA | Zhou, Rongtao,et al."A conceptual model for analyzing particle effects on gas-liquid flows in slurry bubble columns".POWDER TECHNOLOGY 365(2020):28-38. |
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