CFD simulations of a full-loop CFB reactor using coarse-grained Eulerian-Lagrangian dense discrete phase model: Effects of modeling parameters
文献类型：期刊论文
| 作者 | Muhammad, Adnan1,2; Zhang, Nan1 ; Wang, Wei1,2
|
| 刊名 | POWDER TECHNOLOGY
 |
| 出版日期 | 2019-09-01 |
| 卷号 | 354页码:615-629 |
| ISSN号 | 0032-5910 |
| 关键词 | Mesoscale structures EMMS Coarse-graining DDPM CFB CFD |
| DOI | 10.1016/j.powtec.2019.06.016 |
| 英文摘要 | The 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. |
| WOS关键词 | CIRCULATING FLUIDIZED-BED ; GAS-SOLID FLOWS ; MASS-TRANSFER MODEL ; NUMERICAL-SIMULATION ; PARTICLE METHOD ; MESOSCALE STRUCTURES ; MULTISCALE CFD ; SUBGRID MODEL ; GRANULAR FLOW ; 2-PHASE FLOW |
| 资助项目 | National Natural Science Foundation of China[U1710251] ; National Natural Science Foundation of China[21625605] ; National Natural Science Foundation of China[91834302] |
| WOS研究方向 | Engineering |
| 语种 | 英语 |
| 出版者 | ELSEVIER |
| WOS记录号 | WOS:000490625500059 |
| 资助机构 | National Natural Science Foundation of China |
| 源URL | [http://ir.ipe.ac.cn/handle/122111/31161]  |
| 专题 | 中国科学院过程工程研究所 |
| 通讯作者 | Zhang, Nan |
| 作者单位 | 1.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 2.Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, Beijing 100190, Peoples R China |
| 推荐引用方式 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. |
入库方式： OAI收割
来源：过程工程研究所
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