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 | |
刊名 | POWDER TECHNOLOGY
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2017-08-01 | |
卷号 | 318页码:321-328 |
关键词 | Micro Fluidized Beds Wall Effect Cfd-dem Minimum Fluidization Velocity Pressure Overshoot |
ISSN号 | 0032-5910 |
DOI | 10.1016/j.powtec.2017.06.020 |
文献子类 | Article |
英文摘要 | 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. |
WOS关键词 | Reaction Analyzer ; Char Gasification ; Membrane Reactors ; Discrete Particle ; Wall Friction ; Coal Char ; Kinetics ; Mfix ; Flows ; Co2 |
WOS研究方向 | Engineering |
语种 | 英语 |
WOS记录号 | WOS:000407183500034 |
资助机构 | 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) |
内容类型 | 期刊论文 |
源URL | [http://ir.ipe.ac.cn/handle/122111/23174] ![]() |
专题 | 过程工程研究所_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 |
推荐引用方式 GB/T 7714 | 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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