CAS OpenIR
Comparison of two-fluid and discrete particle modeling of gas-particle flows in micro fluidized beds
Liu, Xu1,2; Su, Jinglin2; Qian, Yanan1,2; Cui, Lijie1; Liu, Xiaoxing1,2
2018-10-01
Source PublicationPOWDER TECHNOLOGY
ISSN0032-5910
Volume338Pages:79-86
Abstract

The formation of a more porous zone in the near wall region has been commonly suggested to be one of the main mechanisms of the delayed onset of fluidization in micro fluidized beds (MFBs). If such geometrical effect still plays a major role once the bed is fluidized, it will challenge the applications of Two-Fluid Model (TFM) to simulate micro fluidized beds. In this work this issue is assessed by taking the simulation results of the Computational Fluid Dynamics coupled with the Discrete Element Method (CFD-DEM) as the benchmark data. Both the delayed onset of fluidization and the advanced onset of turbulent fluidization predicted by CFD-DEM simulations are successfully captured by the TFM simulations. The radial profiles of solids volume fraction and solids axial velocity predicted by TFM and CFD-DEM simulations are also in well agreement. Such results demonstrate that TFM can be appropriately used to model micro fluidized beds systems. Parameter analyses show that TFM simulation results are closely related to the input parameter setting. The minimum bubbling velocity predicted by TFM simulations closely depends on the chosen value of frictional packing limit. And the specularity coefficient has a significant impact on the predicted solids flow behavior. (C) 2018 Published by Elsevier B.V.

KeywordMicro Fluidized Beds Cfd-dem Two-fluid Model Regime Transition Boundary Condition
DOI10.1016/j.powtec.2018.06.039
Language英语
WOS KeywordReaction Analyzer ; Numerical Simulations ; Membrane Reactors ; Solid Reactions ; Fixed-beds ; Cfd ; Velocity ; Hydrodynamics ; Diameter ; Gasification
Funding ProjectNational Natural Science Foundation of China[21576265]
WOS Research AreaEngineering
WOS SubjectEngineering, Chemical
Funding OrganizationNational Natural Science Foundation of China
WOS IDWOS:000447569200009
PublisherELSEVIER SCIENCE BV
Citation statistics
Cited Times:5[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/26160
Collection中国科学院过程工程研究所
Corresponding AuthorCui, Lijie; Liu, Xiaoxing
Affiliation1.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
2.Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, Beijing 100190, Peoples R China
Recommended Citation
GB/T 7714
Liu, Xu,Su, Jinglin,Qian, Yanan,et al. Comparison of two-fluid and discrete particle modeling of gas-particle flows in micro fluidized beds[J]. POWDER TECHNOLOGY,2018,338:79-86.
APA Liu, Xu,Su, Jinglin,Qian, Yanan,Cui, Lijie,&Liu, Xiaoxing.(2018).Comparison of two-fluid and discrete particle modeling of gas-particle flows in micro fluidized beds.POWDER TECHNOLOGY,338,79-86.
MLA Liu, Xu,et al."Comparison of two-fluid and discrete particle modeling of gas-particle flows in micro fluidized beds".POWDER TECHNOLOGY 338(2018):79-86.
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