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Quantifying cluster dynamics to improve EMMS drag law and radial heterogeneity description in coupling with gas-solid two-fluid method
Hu, Shanwei1,2; Liu, Xinhua1; Zhang, Nan1; Li, Jinghai1; Ge, Wei1,2; Wang, Wei1,2
2017
Source PublicationCHEMICAL ENGINEERING JOURNAL
ISSN1385-8947
Volume307Issue:JANPages:326-338
Abstract

Quantification of multiscale heterogeneity is the key to the simulation of gas-solid two-phase flow. The energy-minimization multiscale (EMMS) model can be used at different scales to describe local and global heterogeneities as well as steady-state fluid dynamics of gas-solid fluidization. However, the same cluster diameter correlation based on energy dissipation was used in all cases, which may give a smaller cluster diameter than single particle diameter at low solids fluxes. In this paper, a description of the solids mass transfer between the dilute and dense phases in heterogeneous gas-solid flow is proposed to replace the correlation of cluster diameter to avoid some problems associated with the empirical calculation of the cluster diameter. This cluster description can facilitate the prediction of the drag coefficient at the scale of numerical cells in computational fluid dynamics (CFD) at extremely low solids fluxes and the radial heterogeneity in large-scale circulating fluidized bed (CFB) risers with downward particle velocities near the wall. It is integrated with two-fluid model (TFM) to simulate the fluid dynamics in an industrial-scale CFB riser accurately, which is also accelerated significantly by using the predicted radial voidage distribution as the initial condition of CFD. (C) 2016 Elsevier B.V. All rights reserved.

KeywordFluidization Multiscale Emms Mathematical Modeling Cfd Simulation Cluster Diameter
SubtypeArticle
WOS HeadingsScience & Technology ; Technology
DOI10.1016/j.cej.2016.08.084
Indexed BySCI
Language英语
WOS KeywordCIRCULATING FLUIDIZED-BED ; CFD SIMULATION ; FLOW BEHAVIOR ; GRANULAR FLOW ; MODEL ; VELOCITY ; SUSPENSIONS ; PARTICLES ; PROFILES ; RISERS
WOS Research AreaEngineering
WOS SubjectEngineering, Environmental ; Engineering, Chemical
Funding OrganizationStrategic Priority Research Program of the Chinese Academy of Sciences(XDA07080400) ; Natural Science Foundation of China(21376244 ; 91334107)
WOS IDWOS:000387298200035
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/21658
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 100490, Peoples R China
Recommended Citation
GB/T 7714
Hu, Shanwei,Liu, Xinhua,Zhang, Nan,et al. Quantifying cluster dynamics to improve EMMS drag law and radial heterogeneity description in coupling with gas-solid two-fluid method[J]. CHEMICAL ENGINEERING JOURNAL,2017,307(JAN):326-338.
APA Hu, Shanwei,Liu, Xinhua,Zhang, Nan,Li, Jinghai,Ge, Wei,&Wang, Wei.(2017).Quantifying cluster dynamics to improve EMMS drag law and radial heterogeneity description in coupling with gas-solid two-fluid method.CHEMICAL ENGINEERING JOURNAL,307(JAN),326-338.
MLA Hu, Shanwei,et al."Quantifying cluster dynamics to improve EMMS drag law and radial heterogeneity description in coupling with gas-solid two-fluid method".CHEMICAL ENGINEERING JOURNAL 307.JAN(2017):326-338.
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