CAS OpenIR
CFD simulations of a full-loop CFB reactor using coarse-grained Eulerian-Lagrangian dense discrete phase model: Effects of modeling parameters
Muhammad, Adnan1,2; Zhang, Nan2; Wang, Wei1,2
2019-09-01
Source PublicationPOWDER TECHNOLOGY
ISSN0032-5910
Volume354Pages:615-629
AbstractThe hydrodynamics of a 3D full-loop circulating fluidized bed (CFB) reactor were investigated using a coarse-grained dense discrete phase model (DDPM). The effects of changes in key modeling parameters such as the drag force, particle number per parcel, and particle-particle/particle-wall restitution coefficients were thoroughly investigated. Previous experimental data were used as a benchmark for validating the numerical results. In terms of the drag force, the simulation results show that the effect of mesoscale structures on drag force must be considered in the DDPM approach. Regarding the number of particles per parcel, the predictions indicate parcel-independent behavior at all of the coarse-graining ratios tested (d(cl)/d(p) = 55, 95, and 125), which is further proof that parcel-independent results can be achieved when the parcel diameter is in the size range of clusters. The effect of energy dissipation from particle-particle (e(pp)) collisions shows that better results are generated when e(pp), is in the non-ideal range (0.1-0.9) than for the ideal case (e(pp) = 1.0). However, the particle-wall restitution coefficient (e(pw)) has little effect on hydrodynamic behavior in either the ideal or non-ideal collision range. In addition, the effect of the particle size distribution on the full-loop hydrodynamics was investigated. The predicted results are similar to those from mean particle diameter simulations, but the distributions for different particles in the CFB are different. This would certainly affect the heat and mass transfer and reactions, and will be further investigated in our ongoing simulations of combustion in CFBs. (C) 2019 Elsevier B.V. All rights reserved.
KeywordMesoscale structures EMMS Coarse-graining DDPM CFB CFD
DOI10.1016/j.powtec.2019.06.016
Language英语
WOS KeywordCIRCULATING FLUIDIZED-BED ; GAS-SOLID FLOWS ; MASS-TRANSFER MODEL ; NUMERICAL-SIMULATION ; PARTICLE METHOD ; MESOSCALE STRUCTURES ; MULTISCALE CFD ; SUBGRID MODEL ; GRANULAR FLOW ; 2-PHASE FLOW
Funding ProjectNational Natural Science Foundation of China[U1710251] ; National Natural Science Foundation of China[21625605] ; National Natural Science Foundation of China[91834302]
WOS Research AreaEngineering
WOS SubjectEngineering, Chemical
Funding OrganizationNational Natural Science Foundation of China
WOS IDWOS:000490625500059
PublisherELSEVIER
Citation statistics
Cited Times:2[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/31162
Collection中国科学院过程工程研究所
Corresponding AuthorZhang, Nan
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
Muhammad, Adnan,Zhang, Nan,Wang, Wei. CFD simulations of a full-loop CFB reactor using coarse-grained Eulerian-Lagrangian dense discrete phase model: Effects of modeling parameters[J]. POWDER TECHNOLOGY,2019,354:615-629.
APA Muhammad, Adnan,Zhang, Nan,&Wang, Wei.(2019).CFD simulations of a full-loop CFB reactor using coarse-grained Eulerian-Lagrangian dense discrete phase model: Effects of modeling parameters.POWDER TECHNOLOGY,354,615-629.
MLA Muhammad, Adnan,et al."CFD simulations of a full-loop CFB reactor using coarse-grained Eulerian-Lagrangian dense discrete phase model: Effects of modeling parameters".POWDER TECHNOLOGY 354(2019):615-629.
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