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Simulation of heterogeneous structure in a circulating fluidized-bed riser by combining the two-fluid model with the EMMS approach
Alternative TitleInd. Eng. Chem. Res.
Yang, N; Wang, W; Ge, W; Wang, LN; Li, JH
2004-09-01
Source PublicationINDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
ISSN0888-5885
Volume43Issue:18Pages:5548-5561
AbstractTo consider the critical effect of mesoscale structure on the drag coefficient, this paper presents a drag model based on the energy-minimization multiscale (EMMS) approach. The proposed structure parameters are obtained from the EMMS model, and then the average drag coefficient can be calculated from the structure parameters and further incorporated into the two-fluid model to simulate the gas-solid flow in a circulating fluidized-bed riser. Simulation results indicate that the simulated flow structures are different for the EMMS-based drag model and the hybrid model using the Wen and Yu correlation and the Ergun equation. The former shows its improvement in predicting the solids entrainment rate, the mesoscale heterogeneous structure involving clusters or strands, and the radial and axial voidage distributions. The simulation results support the idea that the average drag coefficient is an important factor for the two-fluid model and suggest that the EMMS approach could be used as a kind of multiscale closure law for drag coefficient.; To consider the critical effect of mesoscale structure on the drag coefficient, this paper presents a drag model based on the energy-minimization multiscale (EMMS) approach. The proposed structure parameters are obtained from the EMMS model, and then the average drag coefficient can be calculated from the structure parameters and further incorporated into the two-fluid model to simulate the gas-solid flow in a circulating fluidized-bed riser. Simulation results indicate that the simulated flow structures are different for the EMMS-based drag model and the hybrid model using the Wen and Yu correlation and the Ergun equation. The former shows its improvement in predicting the solids entrainment rate, the mesoscale heterogeneous structure involving clusters or strands, and the radial and axial voidage distributions. The simulation results support the idea that the average drag coefficient is an important factor for the two-fluid model and suggest that the EMMS approach could be used as a kind of multiscale closure law for drag coefficient.
KeywordGas-solid Flow Discrete Particle Simulation Radial Voidage Profiles Drag Coefficient Numerical-simulation Mesoscale Structures 2-phase Flow Systems Hydrodynamics Clusters
SubtypeArticle
WOS HeadingsScience & Technology ; Technology
DOI10.1021/ie049773c
URL查看原文
Indexed BySCI
Language英语
WOS KeywordGAS-SOLID FLOW ; DISCRETE PARTICLE SIMULATION ; RADIAL VOIDAGE PROFILES ; DRAG COEFFICIENT ; NUMERICAL-SIMULATION ; MESOSCALE STRUCTURES ; 2-PHASE FLOW ; SYSTEMS ; HYDRODYNAMICS ; CLUSTERS
WOS Research AreaEngineering
WOS SubjectEngineering, Chemical
WOS IDWOS:000223648400016
Citation statistics
Cited Times:162[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Version出版稿
Identifierhttp://ir.ipe.ac.cn/handle/122111/5016
Collection研究所(批量导入)
AffiliationChinese Acad Sci, Inst Proc Engn, Multiphase React Lab, Beijing 100080, Peoples R China
Recommended Citation
GB/T 7714
Yang, N,Wang, W,Ge, W,et al. Simulation of heterogeneous structure in a circulating fluidized-bed riser by combining the two-fluid model with the EMMS approach[J]. INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH,2004,43(18):5548-5561.
APA Yang, N,Wang, W,Ge, W,Wang, LN,&Li, JH.(2004).Simulation of heterogeneous structure in a circulating fluidized-bed riser by combining the two-fluid model with the EMMS approach.INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH,43(18),5548-5561.
MLA Yang, N,et al."Simulation of heterogeneous structure in a circulating fluidized-bed riser by combining the two-fluid model with the EMMS approach".INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH 43.18(2004):5548-5561.
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