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Numerical analysis of residence time distribution of solids in a bubbling fluidized bed based on the modified structure-based drag model
Zou, Zheng1; Zhao, Yunlong1,2; Zhao, Hu1,2; Li, Hongzhong1; Zhu, Qingshan1; Xie, Zhaohui1; Li, Yingbo3
2017-06-01
Source PublicationPARTICUOLOGY
ISSN1674-2001
Volume32Pages:30-38
Abstract

The residence time distribution (RTD) of solids and the fluidized structure of a bubbling fluidized bed were investigated numerically using computational fluid dynamics simulations coupled with the modified structure-based drag model. A general comparison of the simulated results with theoretical values shows reasonable agreement. As the mean residence time is increased, the RTD initial peak intensity decreases and the RTD curve tail extends farther. Numerous small peaks on the RTD curve are induced by the back mixing and aggregation of particles, which attests to the non-uniform flow structure of the bubbling fluidized bed. The low value of t(50) results in poor contact between phases, and the complete exit age of the overflow particles is much longer for back-mixed solids and those caught in dead regions. The formation of a gulf-stream flow and back-mixing for solids induces an even wider spread of RTD. (C) 2016 Chinese Society of Particuology and Institute of Process Engineering, Chinese Academy of Sciences. Published by Elsevier B.V. All rights reserved.

KeywordFluidization Residence Time Distribution Bubbling Fluidized Bed Modified Structure-based Drag Model Computational Fluid Dynamics Cfd
SubtypeArticle
WOS HeadingsScience & Technology ; Technology
DOI10.1016/j.partic.2016.09.005
Indexed BySCI
Language英语
WOS KeywordCfd Simulation ; Particles ; Flow ; Reactors ; Velocity
WOS Research AreaEngineering ; Materials Science
WOS SubjectEngineering, Chemical ; Materials Science, Multidisciplinary
Funding OrganizationNational Natural Science Foundation of China(21406237) ; State Key Development Program for Basic Research of China (973 Program)(2015CB251402) ; Science Technology Service Network Initiative of the Chinese Academy of Sciences(KFJ-SW-STS-148) ; Fund of the State Key Laboratory of Multiphase Complex Systems(MPCS-2015-A-02)
WOS IDWOS:000401202900004
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/22529
Collection多相复杂系统国家重点实验室
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
3.Chinese Acad Sci, Inst Proc Engn, Key Lab Green Proc & Engn, Beijing 100190, Peoples R China
Recommended Citation
GB/T 7714
Zou, Zheng,Zhao, Yunlong,Zhao, Hu,et al. Numerical analysis of residence time distribution of solids in a bubbling fluidized bed based on the modified structure-based drag model[J]. PARTICUOLOGY,2017,32:30-38.
APA Zou, Zheng.,Zhao, Yunlong.,Zhao, Hu.,Li, Hongzhong.,Zhu, Qingshan.,...&Li, Yingbo.(2017).Numerical analysis of residence time distribution of solids in a bubbling fluidized bed based on the modified structure-based drag model.PARTICUOLOGY,32,30-38.
MLA Zou, Zheng,et al."Numerical analysis of residence time distribution of solids in a bubbling fluidized bed based on the modified structure-based drag model".PARTICUOLOGY 32(2017):30-38.
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