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 | |
刊名 | POWDER TECHNOLOGY
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2018-10-01 | |
卷号 | 338页码:79-86 |
关键词 | Micro Fluidized Beds Cfd-dem Two-fluid Model Regime Transition Boundary Condition |
ISSN号 | 0032-5910 |
DOI | 10.1016/j.powtec.2018.06.039 |
英文摘要 | 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. |
资助项目 | National Natural Science Foundation of China[21576265] |
WOS关键词 | Reaction Analyzer ; Numerical Simulations ; Membrane Reactors ; Solid Reactions ; Fixed-beds ; Cfd ; Velocity ; Hydrodynamics ; Diameter ; Gasification |
WOS研究方向 | Engineering |
语种 | 英语 |
出版者 | ELSEVIER SCIENCE BV |
WOS记录号 | WOS:000447569200009 |
资助机构 | National Natural Science Foundation of China |
内容类型 | 期刊论文 |
源URL | [http://ir.ipe.ac.cn/handle/122111/26159] ![]() |
专题 | 中国科学院过程工程研究所 |
通讯作者 | Cui, Lijie; Liu, Xiaoxing |
作者单位 | 1.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 |
推荐引用方式 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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