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Modeling the hydrodynamics of downer reactors based on the meso-scale structure
Liu, Wenming1,2; Li, Hongzhong1; Zhu, Qingshan1,2
2017-06-01
Source PublicationPOWDER TECHNOLOGY
ISSN0032-5910
Volume314Pages:367-376
Abstract

This work presents a new structure-based drag model for downer reactors combining with the computational fluid dynamics (CFD) method to systematically study the hydrodynamics of downer reactors. Previous studies are limited to simulate the radial performance in downers because of using the conventional drag model. Based on the new drag model, the hydrodynamics of downers in the radial and the axial direction are simulated. Meanwhile, the effect of clusters, which is the typical meso-scale structure, are investigated. It was found that, compared to risers, the drag force would not be influenced by the cluster diameter and voidage in downers heavily. The simulation results by the new structure-based drag model showed reasonable agreements with the experimental data in the radial and axial direction. The unique trends of downers were also obtained, e.g. the dense ring flow structure, axial velocity flow structure and pressure distribution. These results demonstrated that the new structure-based drag model could reflect the hydrodynamics of downer reactors and provide a good understanding on the physical mechanism of the gas-solid flow in downers. (C) 2016 Published by Elsevier B.V.

KeywordFluidization Downer Simulation Drag Hydrodynamics
SubtypeArticle
WOS HeadingsScience & Technology ; Technology
DOI10.1016/j.powtec.2016.09.087
Indexed BySCI
Language英语
WOS KeywordCirculating Fluidized-bed ; Gas-solid Flow ; High-density ; Drag Model ; Eulerian Simulation ; Cfd Simulation ; 2-fluid Model ; Cluster ; Riser ; Coefficient
WOS Research AreaEngineering
WOS SubjectEngineering, Chemical
Funding OrganizationNational Natural Science Foundation of China(21325628) ; State Key Development Program for Basic Research of China (973 Program)(2015CB251402)
WOS IDWOS:000401880700035
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/22523
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, POB 353, Beijing 100190, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Liu, Wenming,Li, Hongzhong,Zhu, Qingshan. Modeling the hydrodynamics of downer reactors based on the meso-scale structure[J]. POWDER TECHNOLOGY,2017,314:367-376.
APA Liu, Wenming,Li, Hongzhong,&Zhu, Qingshan.(2017).Modeling the hydrodynamics of downer reactors based on the meso-scale structure.POWDER TECHNOLOGY,314,367-376.
MLA Liu, Wenming,et al."Modeling the hydrodynamics of downer reactors based on the meso-scale structure".POWDER TECHNOLOGY 314(2017):367-376.
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