An EMMS drag model for coarse grid simulation of polydisperse gas-solid flow in circulating fluidized bed risers
文献类型:期刊论文
作者 | Qin, Zhiyuan1,2; Zhou, Quan1; Wang, Junwu1,2 |
刊名 | CHEMICAL ENGINEERING SCIENCE |
出版日期 | 2019-11-02 |
卷号 | 207页码:358-378 |
ISSN号 | 0009-2509 |
关键词 | Fluidization Clustering Structure Emms Drag Model Meso Scale Structure Particle Size Distribution |
DOI | 10.1016/j.ces.2019.06.037 |
英文摘要 | Polydisperse gas-solid systems are more common in both industry and the natural world than their monodisperse counterparts. This paper aims to investigate the hydrodynamics of polydisperse gas-solid flow systems by extending the energy minimization multiscale (EMMS) drag model. The continuous particle size is discretized into several characteristic sizes, by which the polydisperse particles are classified into several discrete groups. A polydisperse EMMS drag model is then developed by treating these particle groups as solid phases. Finally, the proposed drag model is coupled with the multifluid model to simulate the hydrodynamics of polydisperse gas-solid flow in CFB risers. Extensive simulations are conducted to validate the effectiveness of the polydisperse EMMS drag model and investigate the effects of gas-particle drag models, kinetic theories, and particle-particle drag models on the simulation results. It was found that (i) the polydisperse EMMS drag model can predict the concentration and particle size distribution of polydisperse gas-solid flows better than the traditional drag model; (ii) the particle-particle drag force has an important influence on the mixing and segregation of different particles whereas the particulate phase stress has only a very minor effect, especially when the superficial gas velocity is low. The second finding highlights the need for a suitable particle-particle drag model that considers the effects of mesoscale structures, which will be the topic of our future study. (C) 2019 Elsevier Ltd. All rights reserved. |
WOS关键词 | Group-b Particles ; Lattice-boltzmann Simulations ; Cluster Characteristics ; Mesoscale Structures ; Eulerian Simulation ; Bidisperse Arrays ; Size Distribution ; Binary-mixtures ; 2-fluid Model ; Cfb Risers |
资助项目 | Innovation Academy for Green Manufacture, Chinese Academy of Sciences[IAGM-2019-A13] ; National Natural Science Foundation of China[91834303] ; National Natural Science Foundation of China[91334106] ; Key Research Program of Frontier Science, Chinese Academy of Sciences[QYZDJ-SSW-JSC029] |
WOS研究方向 | Engineering |
语种 | 英语 |
出版者 | PERGAMON-ELSEVIER SCIENCE LTD |
WOS记录号 | WOS:000481644300029 |
资助机构 | Innovation Academy for Green Manufacture, Chinese Academy of Sciences ; National Natural Science Foundation of China ; Key Research Program of Frontier Science, Chinese Academy of Sciences |
源URL | [http://ir.ipe.ac.cn/handle/122111/30546] |
专题 | 中国科学院过程工程研究所 |
通讯作者 | Wang, Junwu |
作者单位 | 1.Chinese Acad Sci, Inst Proc Engn, Key Lab Multiphase Complex Syst, Beijing 100190, Peoples R China 2.Univ Chinese Acad Sci, Sch Chem Engn, Beijing 100049, Peoples R China |
推荐引用方式 GB/T 7714 | Qin, Zhiyuan,Zhou, Quan,Wang, Junwu. An EMMS drag model for coarse grid simulation of polydisperse gas-solid flow in circulating fluidized bed risers[J]. CHEMICAL ENGINEERING SCIENCE,2019,207:358-378. |
APA | Qin, Zhiyuan,Zhou, Quan,&Wang, Junwu.(2019).An EMMS drag model for coarse grid simulation of polydisperse gas-solid flow in circulating fluidized bed risers.CHEMICAL ENGINEERING SCIENCE,207,358-378. |
MLA | Qin, Zhiyuan,et al."An EMMS drag model for coarse grid simulation of polydisperse gas-solid flow in circulating fluidized bed risers".CHEMICAL ENGINEERING SCIENCE 207(2019):358-378. |
入库方式: OAI收割
来源:过程工程研究所
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