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Modeling the hydrodynamics of cocurrent gas-solid downers according to energy-minimization multi-scale theory
Zhang, Zhixin1,2; Hu, Shanwei1; Liu, Xinhua1; Zhao, Hui2
2016-12-01
发表期刊PARTICUOLOGY
ISSN1674-2001
卷号29期号:DEC页码:110-119
摘要

Cocurrent gas-solid downer reactors have many applications in industry because they possess the technological advantages of a lower pressure drop, shorter residence time, and less solid backmixing when compared with traditional circulating fluidized bed risers. By introducing the concept of particle clusters explicitly, a one-dimensional model with consideration of the interphase interactions between the fluid and particles at both microscale and mesoscale is formulated for concurrent downward gas-solid flow according to energy-minimization multi-scale (EMMS) theory. A unified stability condition is proposed for the differently developed sections of gas-solid flow according to the principle of the compromise in competition between dominant mechanisms. By optimizing the number density of particle clusters with respect to the stability condition, the formulated model can be numerically solved without introducing cluster-specific empirical correlations. The EMMS-based model predicts well the axial hydrodynamics of cocurrent gas-solid downers and is expected to have a wider range of applications than the existing cluster-based models. (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Mathematical Modeling Hydrodynamics Fluidization Downer Cluster Multiscale
文章类型Article
WOS标题词Science & Technology ; Technology
DOI10.1016/j.partic.2016.01.011
收录类别SCI
语种英语
关键词[WOS]CIRCULATING FLUIDIZED-BED ; EMMS MODEL ; FLOW ; REACTOR ; RISER ; BEHAVIOR ; SIMULATION ; CARBON ; CFD ; PERFORMANCE
WOS研究方向Engineering ; Materials Science
WOS类目Engineering, Chemical ; Materials Science, Multidisciplinary
项目资助者Strategic Priority Research Program of the Chinese Academy of Sciences(XDA07080400) ; Natural Science Foundation of China(21376244 ; 91334107)
WOS记录号WOS:000389114700011
引用统计
文献类型期刊论文
条目标识符http://ir.ipe.ac.cn/handle/122111/21679
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.China Univ Petr, State Key Lab Heavy Oil Proc, Qingdao 266555, Peoples R China
推荐引用方式
GB/T 7714
Zhang, Zhixin,Hu, Shanwei,Liu, Xinhua,et al. Modeling the hydrodynamics of cocurrent gas-solid downers according to energy-minimization multi-scale theory[J]. PARTICUOLOGY,2016,29(DEC):110-119.
APA Zhang, Zhixin,Hu, Shanwei,Liu, Xinhua,&Zhao, Hui.(2016).Modeling the hydrodynamics of cocurrent gas-solid downers according to energy-minimization multi-scale theory.PARTICUOLOGY,29(DEC),110-119.
MLA Zhang, Zhixin,et al."Modeling the hydrodynamics of cocurrent gas-solid downers according to energy-minimization multi-scale theory".PARTICUOLOGY 29.DEC(2016):110-119.
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