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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
2020-04-01
Source PublicationPOWDER TECHNOLOGY
ISSN0032-5910
Volume365Pages:28-38
Abstract

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.

KeywordCfd Bubble Column Drag Mesoscale Multiphase Flow
DOI10.1016/j.powtec.2019.03.025
Language英语
WOS KeywordSolid Flow ; Stability Condition ; Regime Transition ; Multiscale Method ; Cfd Simulation ; Scale-up ; Holdup ; Behavior ; Coefficient ; Coalescence
Funding ProjectNational Key Research and Development Program of China[2017YFE0106500] ; National Natural Science Foundation of China[91834303] ; National Natural Science Foundation of China[91634203]
WOS Research AreaEngineering
WOS SubjectEngineering, Chemical
Funding OrganizationNational Key Research and Development Program of China ; National Natural Science Foundation of China
WOS IDWOS:000528265800004
PublisherELSEVIER
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/40338
Collection中国科学院过程工程研究所
Corresponding AuthorYang, Ning
Affiliation1.Chinese Acad Sci, Inst Proc Engn, Ctr Mesosci, Beijing 100190, Peoples R China
2.Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, Beijing 100190, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
Recommended Citation
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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