CAS OpenIR
CFD-PBM simulation of gas?solid bubbling flow with structure-dependent drag coefficients
Hu, Shanwei1; Liu, Xinhua1,2
2021-06-01
Source PublicationCHEMICAL ENGINEERING JOURNAL
ISSN1385-8947
Volume413Pages:11
AbstractBubble size distribution resulted from bubble coalescence and breakup has significant effects on the effective interphase drag in gas?solid bubbling fluidized beds, which was however not taken into account in previous coarse-grid simulations. In this study, the population balance model (PBM) was used to describe the dynamic evolution of gas bubbles in gas?solid bubbling fluidization, wherein the coalescence and breakup kernels were derived by considering the effects of bubble velocity difference, wake capture and bubble instability. An improved energy-minimization multi-scale (EMMS) bubbling model was developed to calculate the effective interphase drag in sub-grid scale. By incorporating both the PBM and the EMMS drag into an Eulerian continuum model, a CFD-PBM-EMMS coupled scheme was further proposed to predict the hydrodynamics of bubbling fluidized beds. The scheme was validated through comparison of simulated results with experimental data. The bed expansion characteristics and the lateral profiles of solids velocities were reasonably predicted at acceptable computational cost. Satisfactory agreement was also achieved between the measured and simulated bubble size distributions. The proposed sub-grid drag model and coupled simulation scheme can facilitate capturing the salient features of the hydrodynamics of gas?solid bubbling fluidized beds.
KeywordGas bubble Gas-solid fluidization Coarse-grid simulation Population balance model EMMS Interphase drag force
DOI10.1016/j.cej.2020.127503
Language英语
Funding Project"Transformational Technologies for Clean Energy and Demonstration", Strategic Priority Research Program of the Chinese Academy of Sciences[XDA21040400] ; National Natural Science Foundation of China[22008240]
WOS Research AreaEngineering
WOS SubjectEngineering, Environmental ; Engineering, Chemical
Funding Organization"Transformational Technologies for Clean Energy and Demonstration", Strategic Priority Research Program of the Chinese Academy of Sciences ; National Natural Science Foundation of China
WOS IDWOS:000638237900001
PublisherELSEVIER SCIENCE SA
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/48443
Collection中国科学院过程工程研究所
Corresponding AuthorLiu, Xinhua
Affiliation1.Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, Beijing 100190, Peoples R China
2.Dalian Natl Lab Clean Energy, Dalian 116023, Peoples R China
Recommended Citation
GB/T 7714
Hu, Shanwei,Liu, Xinhua. CFD-PBM simulation of gas?solid bubbling flow with structure-dependent drag coefficients[J]. CHEMICAL ENGINEERING JOURNAL,2021,413:11.
APA Hu, Shanwei,&Liu, Xinhua.(2021).CFD-PBM simulation of gas?solid bubbling flow with structure-dependent drag coefficients.CHEMICAL ENGINEERING JOURNAL,413,11.
MLA Hu, Shanwei,et al."CFD-PBM simulation of gas?solid bubbling flow with structure-dependent drag coefficients".CHEMICAL ENGINEERING JOURNAL 413(2021):11.
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