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CFD-DEM modeling the effect of column size and bed height on minimum fluidization velocity in micro fluidized beds with Geldart B particles
Xu, Yupeng1; Li, Tingwen1,2; Musser, Jordan1; Liu, Xiaoxing3; Xu, Guangwen3; Rogers, William A.1
2017-08-01
发表期刊POWDER TECHNOLOGY
ISSN0032-5910
卷号318页码:321-328
摘要The fluidization behavior of Geldart B particles in micro fluidized beds is investigated numerically using Computational Fluid Dynamics coupled with Discrete Element Method (CFD-DEM) available in the open-source Multiphase Flow with Interphase eXchanges (MFIX) code. The effects of different bed inner diameters (D) of 8 mm, 12 mm, 16 mm and various initial static bed heights (H) were examined. It is found that both decreasing the column diameter and increasing the bed height in a micro fluidized bed increases the minimum fluidization velocity (Umf). The observed overshoot in pressure drop that occurs before the onset of fluidization decreases in magnitude with increasing column diameter, however there is less sensitivity to bed height. Overall, the numerical results agree qualitatively with existing theoretical correlations and experimental studies. The simulations show that both column diameter and particle-wall friction contribute to the variation in minimum fluidization velocity. These two factors are coupled and hard to separate. The detailed influences of wall friction on minimum fluidization velocity are then investigated for a prescribed column diameter of 8 mm by varying the wall friction from 0 to 0.4. (C) 2017 Elsevier B.V. All rights reserved.
关键词Micro Fluidized Beds Wall Effect Cfd-dem Minimum Fluidization Velocity Pressure Overshoot
文章类型Article
WOS标题词Science & Technology ; Technology
DOI10.1016/j.powtec.2017.06.020
收录类别SCI
语种英语
关键词[WOS]REACTION ANALYZER ; CHAR GASIFICATION ; MEMBRANE REACTORS ; DISCRETE PARTICLE ; WALL FRICTION ; COAL CHAR ; KINETICS ; MFIX ; FLOWS ; CO2
WOS研究方向Engineering
WOS类目Engineering, Chemical
项目资助者U.S. Department of Energy(DE-FE0004000) ; Office of Fossil Energy's Advanced Numerical Simulation of Multiphase Flow through National Energy Technology Laboratory under RES(DE-FE0004000)
WOS记录号WOS:000407183500034
引用统计
文献类型期刊论文
条目标识符http://ir.ipe.ac.cn/handle/122111/23174
专题多相复杂系统国家重点实验室
作者单位1.Natl Energy Technol Lab, Morgantown, WV 26505 USA
2.AECOM, Morgantown, WV 26505 USA
3.Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, Beijing 100190, Peoples R China
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Xu, Yupeng,Li, Tingwen,Musser, Jordan,et al. CFD-DEM modeling the effect of column size and bed height on minimum fluidization velocity in micro fluidized beds with Geldart B particles[J]. POWDER TECHNOLOGY,2017,318:321-328.
APA Xu, Yupeng,Li, Tingwen,Musser, Jordan,Liu, Xiaoxing,Xu, Guangwen,&Rogers, William A..(2017).CFD-DEM modeling the effect of column size and bed height on minimum fluidization velocity in micro fluidized beds with Geldart B particles.POWDER TECHNOLOGY,318,321-328.
MLA Xu, Yupeng,et al."CFD-DEM modeling the effect of column size and bed height on minimum fluidization velocity in micro fluidized beds with Geldart B particles".POWDER TECHNOLOGY 318(2017):321-328.
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