CAS OpenIR  > 研究所(批量导入)
Three-dimensional simulation of dense suspension upflow regime in high-density CFB risers with EMMS-based two-fluid model
Alternative TitleChem. Eng. Sci.
Zhou, Quan1,2; Wang, Junwu1; Li, Jinghai1
2014-04-07
Source PublicationCHEMICAL ENGINEERING SCIENCE
ISSN0009-2509
Volume107Issue:1Pages:206-217
AbstractDense suspension upflow (DSU) regime in high-density circulating fluidized bed (CFB) risers, featuring no downward particle flux and high mean solid holdup, offers significant advantages over conventional fast fluidization, such as much less solid backmixing and higher solid holdup. While most oldie previous CFD simulations are limited to the regime of fast fluidization in low-density CFB risers, it is difficult to reproduce the hydrodynamics of DSU regime using CFD simulation. In this study, a recently proposed EMMS-based two-fluid model (Wang et al., 2012. Chem. Eng. Sci. 75,349-358), where the particle-rich dense phase and gas-rich dilute phase are treated as the two interpenetrating continua instead of treating gas and solid phases as interpenetrating continua as in standard two-fluid models, is first modified and then used to study the hydrodynamics of high-density CFB risers. Extensive simulations haw been performed, and the comparison with experimental data indicated that the EMMS-based two-fluid model had the ability to correctly capture main features of the DSU regime. Therefore, present study not only provided further validation of the idea and feasibility of EMMS-based two-fluid model, but also offered new possibility to explore the hydrodynamic characteristics of DSU regime in high-density CFB risers. (C) 2013 Elsevier Ltd. All rights reserved.; Dense suspension upflow (DSU) regime in high-density circulating fluidized bed (CFB) risers, featuring no downward particle flux and high mean solid holdup, offers significant advantages over conventional fast fluidization, such as much less solid backmixing and higher solid holdup. While most oldie previous CFD simulations are limited to the regime of fast fluidization in low-density CFB risers, it is difficult to reproduce the hydrodynamics of DSU regime using CFD simulation. In this study, a recently proposed EMMS-based two-fluid model (Wang et al., 2012. Chem. Eng. Sci. 75,349-358), where the particle-rich dense phase and gas-rich dilute phase are treated as the two interpenetrating continua instead of treating gas and solid phases as interpenetrating continua as in standard two-fluid models, is first modified and then used to study the hydrodynamics of high-density CFB risers. Extensive simulations haw been performed, and the comparison with experimental data indicated that the EMMS-based two-fluid model had the ability to correctly capture main features of the DSU regime. Therefore, present study not only provided further validation of the idea and feasibility of EMMS-based two-fluid model, but also offered new possibility to explore the hydrodynamic characteristics of DSU regime in high-density CFB risers. (C) 2013 Elsevier Ltd. All rights reserved.
KeywordMeso-scale Stability Condition Fluidization Multiphase Flow Powder Technology Particulate Processes
SubtypeArticle
WOS HeadingsScience & Technology ; Technology
DOI10.1016/j.ces.2013.12.020
URL查看原文
Indexed BySCI
Language英语
WOS KeywordCIRCULATING FLUIDIZED-BED ; GROUP-B PARTICLES ; GAS-SOLID FLOWS ; CLUSTER CHARACTERISTICS ; MESOSCALE STRUCTURES ; EULERIAN SIMULATION ; BOUNDARY-CONDITION ; GELDART ; SYSTEMS ; BEHAVIOR
WOS Research AreaEngineering
WOS SubjectEngineering, Chemical
WOS IDWOS:000330576500018
Citation statistics
Cited Times:26[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Version出版稿
Identifierhttp://ir.ipe.ac.cn/handle/122111/8230
Collection研究所(批量导入)
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
Zhou, Quan,Wang, Junwu,Li, Jinghai. Three-dimensional simulation of dense suspension upflow regime in high-density CFB risers with EMMS-based two-fluid model[J]. CHEMICAL ENGINEERING SCIENCE,2014,107(1):206-217.
APA Zhou, Quan,Wang, Junwu,&Li, Jinghai.(2014).Three-dimensional simulation of dense suspension upflow regime in high-density CFB risers with EMMS-based two-fluid model.CHEMICAL ENGINEERING SCIENCE,107(1),206-217.
MLA Zhou, Quan,et al."Three-dimensional simulation of dense suspension upflow regime in high-density CFB risers with EMMS-based two-fluid model".CHEMICAL ENGINEERING SCIENCE 107.1(2014):206-217.
Files in This Item:
File Name/Size DocType Version Access License
Three-dimensional si(3523KB) 限制开放CC BY-NC-SAApplication Full Text
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Zhou, Quan]'s Articles
[Wang, Junwu]'s Articles
[Li, Jinghai]'s Articles
Baidu academic
Similar articles in Baidu academic
[Zhou, Quan]'s Articles
[Wang, Junwu]'s Articles
[Li, Jinghai]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Zhou, Quan]'s Articles
[Wang, Junwu]'s Articles
[Li, Jinghai]'s Articles
Terms of Use
No data!
Social Bookmark/Share
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.