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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
Source PublicationPOWDER TECHNOLOGY
ISSN0032-5910
Volume318Pages:321-328
Abstract

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.

KeywordMicro Fluidized Beds Wall Effect Cfd-dem Minimum Fluidization Velocity Pressure Overshoot
SubtypeArticle
WOS HeadingsScience & Technology ; Technology
DOI10.1016/j.powtec.2017.06.020
Indexed BySCI
Language英语
WOS KeywordReaction Analyzer ; Char Gasification ; Membrane Reactors ; Discrete Particle ; Wall Friction ; Coal Char ; Kinetics ; Mfix ; Flows ; Co2
WOS Research AreaEngineering
WOS SubjectEngineering, Chemical
Funding OrganizationU.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 IDWOS:000407183500034
Citation statistics
Cited Times:6[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/23174
Collection多相复杂系统国家重点实验室
Affiliation1.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
Recommended Citation
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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