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Hydrodynamic study on magnetized fluidized beds with Geldart-B magnetizable particles
Alternative TitlePowder Technol.
Zhu, Quanhong1,2; Li, Hongzhong1; Zhu, Qingshan1; Li, Jun1; Zou, Zheng1
2014-12-01
Source PublicationPOWDER TECHNOLOGY
ISSN0032-5910
Volume268Issue:DECPages:48-58
AbstractWhen Geldart-B magnetizable particles are fluidized under the simultaneous influence of the gravitational field and the-magnetic field, there appear several flow regimes with different hydrodynamic behaviors. The present study focused on the hydrodynamics in the magnetized fluidized bed (MFB) flow regime. The applied magnetic field was axial, uniform, and steady; with Geldart-B iron particles as bed material experiments were conducted in both 2D and 3D beds. According to the gas-solid flow hydrodynamics, the MFB flow regime could be further divided into two distinguishable sub-regimes: magnetized-bubbling regime and channel-bubbling regime. In the channel-bubbling sub-regime, fluidization quality deteriorated due to the channel formation. In the magnetized-bubbling sub-regime, bubble sizes decreased while bubble frequency increased with increasing magnetic field intensities; fluidization quality was gradually improved. Meanwhile, bubbles were severely suppressed in the lateral direction, causing the change in bubble shape from nearly round to elliptic. Several reasons for both bubble size reduction and bubble shape change were analyzed. In addition, a new operational phase diagram was drawn to provide a panoramic view of the fluidization behaviors of Geldart-B magnetizable particles under the action of uniform magnetic fields. (C) 2014 Elsevier B.V. All rights reserved.; When Geldart-B magnetizable particles are fluidized under the simultaneous influence of the gravitational field and the-magnetic field, there appear several flow regimes with different hydrodynamic behaviors. The present study focused on the hydrodynamics in the magnetized fluidized bed (MFB) flow regime. The applied magnetic field was axial, uniform, and steady; with Geldart-B iron particles as bed material experiments were conducted in both 2D and 3D beds. According to the gas-solid flow hydrodynamics, the MFB flow regime could be further divided into two distinguishable sub-regimes: magnetized-bubbling regime and channel-bubbling regime. In the channel-bubbling sub-regime, fluidization quality deteriorated due to the channel formation. In the magnetized-bubbling sub-regime, bubble sizes decreased while bubble frequency increased with increasing magnetic field intensities; fluidization quality was gradually improved. Meanwhile, bubbles were severely suppressed in the lateral direction, causing the change in bubble shape from nearly round to elliptic. Several reasons for both bubble size reduction and bubble shape change were analyzed. In addition, a new operational phase diagram was drawn to provide a panoramic view of the fluidization behaviors of Geldart-B magnetizable particles under the action of uniform magnetic fields. (C) 2014 Elsevier B.V. All rights reserved.
KeywordHydrodynamic Magnetized Fluidized Bed Magnetizable Particle Flow Regime Bubble
SubtypeArticle
WOS HeadingsScience & Technology ; Technology
DOI10.1016/j.powtec.2014.08.019
URL查看原文
Indexed BySCI
Language英语
WOS KeywordFIELD ASSISTED FLUIDIZATION ; NONMAGNETIC PARTICLES ; FERROMAGNETIC PARTICLES ; MAGNETOFLUIDIZED BEDS ; UNIFIED APPROACH ; STABILIZATION ; BEHAVIOR ; SIMULATION ; ADMIXTURE ; MIXTURES
WOS Research AreaEngineering
WOS SubjectEngineering, Chemical
WOS IDWOS:000343852700005
Citation statistics
Cited Times:5[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/11698
Collection研究所(批量导入)
Affiliation1.Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, Beijing 100190, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Zhu, Quanhong,Li, Hongzhong,Zhu, Qingshan,et al. Hydrodynamic study on magnetized fluidized beds with Geldart-B magnetizable particles[J]. POWDER TECHNOLOGY,2014,268(DEC):48-58.
APA Zhu, Quanhong,Li, Hongzhong,Zhu, Qingshan,Li, Jun,&Zou, Zheng.(2014).Hydrodynamic study on magnetized fluidized beds with Geldart-B magnetizable particles.POWDER TECHNOLOGY,268(DEC),48-58.
MLA Zhu, Quanhong,et al."Hydrodynamic study on magnetized fluidized beds with Geldart-B magnetizable particles".POWDER TECHNOLOGY 268.DEC(2014):48-58.
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