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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
发表期刊PARTICUOLOGY
ISSN1674-2001
卷号32页码:30-38
摘要

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.

关键词Fluidization Residence Time Distribution Bubbling Fluidized Bed Modified Structure-based Drag Model Computational Fluid Dynamics Cfd
文章类型Article
WOS标题词Science & Technology ; Technology
DOI10.1016/j.partic.2016.09.005
收录类别SCI
语种英语
关键词[WOS]Cfd Simulation ; Particles ; Flow ; Reactors ; Velocity
WOS研究方向Engineering ; Materials Science
WOS类目Engineering, Chemical ; Materials Science, Multidisciplinary
项目资助者National 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记录号WOS:000401202900004
引用统计
文献类型期刊论文
条目标识符http://ir.ipe.ac.cn/handle/122111/22529
专题多相复杂系统国家重点实验室
作者单位1.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
推荐引用方式
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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