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Structure-dependent analysis of energy dissipation in gas-solid flows: Beyond nonequilibrium thermodynamics
Tian, Yujie; Geng, Jingwei; Wang, Wei1
2017-11-02
Source PublicationCHEMICAL ENGINEERING SCIENCE
ISSN0009-2509
Volume171Issue:NOVPages:271-281
Abstract

Gas-solid fluidized bed is a typical dissipative system, featuring meso-scale structures with bimodal distribution of parameters. The energy-minimization multi-scale (EMMS) model focuses on such dissipative characteristics and has shown many successful applications. In previous work, through structure dependent analysis of mass, momentum and energy conservation, we have discussed the consistency between the hydrodynamic equations of two-fluid model (TFM) and those of the EMMS model. In this work, we extend this structure-dependent analysis to the extremum behavior of dissipation processes, revealing that the solution based on the minimum energy dissipation rate applies only to homogeneous, dilute flow states, but fails in the particle-fluid compromising fluidization regime, in particular, fails to predict choking transition. By comparison, the EMMS variational stability condition that is based on the principle of compromise in competition between dominant mechanisms well describes the flow regimes of fluidization. This work unfolds a fresh viewpoint to understand the EMMS stability condition that is beyond the analysis of extremum of energy dissipation. And it is expected to boost the development of EMMS-based meso-scale modeling in broader realm of multiphase flow systems. (C) 2017 Elsevier Ltd. All rights reserved.

KeywordEmms Fluidization Meso-scale Energy Dissipation Entropy Production Nonequilibrium Thermodynamics
SubtypeArticle
WOS HeadingsScience & Technology ; Technology
DOI10.1016/j.ces.2017.05.037
Indexed BySCI
Language英语
WOS KeywordMULTI-FLUID MODEL ; EULERIAN SIMULATION ; CFD SIMULATION ; 2-PHASE FLOW ; RISER FLOWS ; EMMS ; FLUIDIZATION ; BEDS ; MESOSCALE ; PARTICLES
WOS Research AreaEngineering
WOS SubjectEngineering, Chemical
WOS IDWOS:000409285000021
Citation statistics
Cited Times:11[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/23216
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.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Tian, Yujie,Geng, Jingwei,Wang, Wei. Structure-dependent analysis of energy dissipation in gas-solid flows: Beyond nonequilibrium thermodynamics[J]. CHEMICAL ENGINEERING SCIENCE,2017,171(NOV):271-281.
APA Tian, Yujie,Geng, Jingwei,&Wang, Wei.(2017).Structure-dependent analysis of energy dissipation in gas-solid flows: Beyond nonequilibrium thermodynamics.CHEMICAL ENGINEERING SCIENCE,171(NOV),271-281.
MLA Tian, Yujie,et al."Structure-dependent analysis of energy dissipation in gas-solid flows: Beyond nonequilibrium thermodynamics".CHEMICAL ENGINEERING SCIENCE 171.NOV(2017):271-281.
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