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Extremum characteristics of energy consumption in fluidization analyzed by using EMMS
Du, Mengjie1,2; Hu, Shanwei1; Chen, Jianhua1; Liu, Xinhua1; Ge, Wei1,2
2018-06-15
Source PublicationCHEMICAL ENGINEERING JOURNAL
ISSN1385-8947
Volume342Pages:386-394
Abstract

This paper investigates the landscape of extremum characteristics for different energy consumption terms in gas-solid fluidization based on the Energy Minimization Multi-Scale (EMMS) model. The influence of typical cluster correlations on the extremum characteristics is also investigated to consolidate the results. The energy consumption terms are resolved into three types, i.e. suspension ("s"), transport ("t") of the particles and pure dissipation ("d") caused by their collisions and acceleration. Three regimes which are particle-dominated (PD), fluid-dominated (FD), and particle-fluid compromising (PFC) respectively subject to the extrema of epsilon = min, W-st = min and N-st = min, are investigated. Then the same procedure is extended to individual and combined terms (i.e. "s", "t", "d", "s+t", "t+d", "d+s") of energy consumption with respect to unit mass of particles ("N") and to unit volume of bed ("W"). The study of extremum characteristics reveals an enclosure structure which features an upper voidage regime corresponding to minimum energy dissipation rate (MinED), a lower voidage regime to maximum energy dissipation rate (MaxED) and a so-called mesoregime in between. The landscape of extremum characteristics reveals that the stability condition must be constructed according to clear physical meaning, otherwise misleading may occur due to multiple contradictive extrema exist in specific regimes. Although the clustering effects on extremum characteristics exposed some limitations of current correlations, the above-mentioned characteristics are found to be insensitive to cluster diameter correlations, indicating that the findings are intrinsic to the EMMS model. Further work is still needed to explore the mesoscale structure and its relationship with extremum behavior as well as underlying physics in fluidization.

KeywordEnergy Minimization Multi-scale (Emms) Mesoscale Stability Condition Cluster Compromise In Competition
DOI10.1016/j.cej.2018.02.065
Language英语
WOS KeywordMultiscale Cfd Approach ; Gas-solid Flows ; Model ; Simulation ; Systems ; Heterogeneity ; Choking
Funding ProjectNational Natural Science Foundation of China (NSFC)[21225628] ; National Natural Science Foundation of China (NSFC)[91434201] ; Chinese Academy of Sciences[XDA07080100] ; Key Research Program of Frontier Sciences[QYZDJ-SSW-JSC029] ; State Key Laboratory of Multiphase Complex Systems[MPCS-2015-A-03]
WOS Research AreaEngineering
WOS SubjectEngineering, Environmental ; Engineering, Chemical
Funding OrganizationNational Natural Science Foundation of China (NSFC) ; Chinese Academy of Sciences ; Key Research Program of Frontier Sciences ; State Key Laboratory of Multiphase Complex Systems
WOS IDWOS:000440404800038
PublisherELSEVIER SCIENCE SA
Citation statistics
Cited Times:5[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/25379
Collection中国科学院过程工程研究所
Corresponding AuthorChen, Jianhua; Liu, Xinhua
Affiliation1.Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, Beijing 100190, Peoples R China
2.Univ Chinese Acad Sci, Sch Chem & Chem Engn, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Du, Mengjie,Hu, Shanwei,Chen, Jianhua,et al. Extremum characteristics of energy consumption in fluidization analyzed by using EMMS[J]. CHEMICAL ENGINEERING JOURNAL,2018,342:386-394.
APA Du, Mengjie,Hu, Shanwei,Chen, Jianhua,Liu, Xinhua,&Ge, Wei.(2018).Extremum characteristics of energy consumption in fluidization analyzed by using EMMS.CHEMICAL ENGINEERING JOURNAL,342,386-394.
MLA Du, Mengjie,et al."Extremum characteristics of energy consumption in fluidization analyzed by using EMMS".CHEMICAL ENGINEERING JOURNAL 342(2018):386-394.
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