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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
Source PublicationPARTICUOLOGY
ISSN1674-2001
Volume29Issue:DECPages:110-119
Abstract

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.

KeywordMathematical Modeling Hydrodynamics Fluidization Downer Cluster Multiscale
SubtypeArticle
WOS HeadingsScience & Technology ; Technology
DOI10.1016/j.partic.2016.01.011
Indexed BySCI
Language英语
WOS KeywordCIRCULATING FLUIDIZED-BED ; EMMS MODEL ; FLOW ; REACTOR ; RISER ; BEHAVIOR ; SIMULATION ; CARBON ; CFD ; PERFORMANCE
WOS Research AreaEngineering ; Materials Science
WOS SubjectEngineering, Chemical ; Materials Science, Multidisciplinary
Funding OrganizationStrategic Priority Research Program of the Chinese Academy of Sciences(XDA07080400) ; Natural Science Foundation of China(21376244 ; 91334107)
WOS IDWOS:000389114700011
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/21679
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.China Univ Petr, State Key Lab Heavy Oil Proc, Qingdao 266555, Peoples R China
Recommended Citation
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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