Flow structures inside a large-scale turbulent fluidized bed of FCC particles: Eulerian simulation with an EMMS-based sub-grid scale model
文献类型：期刊论文
| 作者 | Wang, Junwu
|
| 刊名 | PARTICUOLOGY
 |
| 出版日期 | 2010-04-01 |
| 卷号 | 8期号:2页码:176-185 |
| 关键词 | Fluidization Eulerian simulation EMMS model Sub-grid scale model |
| ISSN号 | 1674-2001 |
| 通讯作者 | Wang, JW |
| 英文摘要 | Turbulent fluidized bed reactors are widely used in industry. However, CFD simulations of the hydrodynamic characteristics of these reactors are relatively sparse, despite the urgent demand from industry. To address this problem, Eulerian simulations with an EMMS-based sub-grid scale model, accounting for the effect of sub-grid scale structures on the inter-phase friction, are performed to study the hydrodynamics inside a large-scale turbulent fluidized bed of FCC particles. It is shown that the simulated axial and radial solid concentration profiles, entrained solid fluxes and standard deviation of the solid concentration fluctuation agreed well with experimental data available in the literature. In-depth analysis of time-averaged particle velocity and solid concentration shows that a dense-suspension upflow regime coexists with fast fluidization regime in this bed, which is reminiscent of the hydrodynamic characteristics in high-density circulating fluidized bed (CFB) risers, even though they are operated in different fluidization regimes. The Reynolds stresses in turbulent fluidized beds are anisotropic, but the degree of anisotropy is far less pronounced than the reported values in CFB risers. It was also found that the solid concentration fluctuation and axial particle velocity fluctuation are strongly correlated. (C) 2009 Chinese Society of Particuology and Institute of Process Engineering, Chinese Academy of Sciences. Published by Elsevier B.V. All rights reserved. |
| WOS标题词 | Science & Technology ; Technology |
| 类目[WOS] | Engineering, Chemical ; Materials Science, Multidisciplinary |
| 研究领域[WOS] | Engineering ; Materials Science |
| 关键词[WOS] | GAS-SOLID FLOWS ; CFD SIMULATION ; KINETIC-THEORY ; RISER ; FLUCTUATIONS ; TEMPERATURE ; SUSPENSIONS ; REGIMES ; SYSTEMS |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000276581200010 |
| 公开日期 | 2013-11-19 |
| 版本 | 出版稿 |
| 源URL | [http://ir.ipe.ac.cn/handle/122111/6176]  |
| 专题 | 过程工程研究所_多相复杂系统国家重点实验室 |
| 作者单位 | Chinese Acad Sci, State Key Lab Multiphase Complex Syst, Inst Proc Engn, Beijing 100190, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wang, Junwu. Flow structures inside a large-scale turbulent fluidized bed of FCC particles: Eulerian simulation with an EMMS-based sub-grid scale model[J]. PARTICUOLOGY,2010,8(2):176-185. |
| APA | Wang, Junwu.(2010).Flow structures inside a large-scale turbulent fluidized bed of FCC particles: Eulerian simulation with an EMMS-based sub-grid scale model.PARTICUOLOGY,8(2),176-185. |
| MLA | Wang, Junwu."Flow structures inside a large-scale turbulent fluidized bed of FCC particles: Eulerian simulation with an EMMS-based sub-grid scale model".PARTICUOLOGY 8.2(2010):176-185. |
入库方式： OAI收割
来源：过程工程研究所
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