Coarse grid simulation of heterogeneous gas-solid flow in a CFB riser with polydisperse particles
文献类型：期刊论文
| 作者 | Chen, Xizhong1,2; Wang, Junwu1 ; Li, Jinghai1
|
| 刊名 | CHEMICAL ENGINEERING JOURNAL
 |
| 出版日期 | 2013-12-01 |
| 卷号 | 234期号:0页码:173-183 |
| 关键词 | Multiphase flow Population balance model Fluidization Meso-scale structure EMMS drag model Particle polydispersity |
| 英文摘要 | Industrial fluidized beds usually show a wide particle size distribution which significantly affects the performance of gas-solid two-phase reactors. However, in traditional CFD models the particle size distribution is often represented by the Sauter mean diameter no matter whether the distribution is wide or narrow, which cannot reflect the effects of the particle size distribution on its operation. In this study, a simplified population balance model (PBM) is combined with two-fluid model (TFM) and the Energy Minimization Multi-Scale (EMMS) drag model for simulating heterogeneous gas-solid flow. The EMMS drag model is used to characterize the effects of meso-scale clustering structures on the inter-phase drag force. The current model is compared with the model with the assumption of single particle diameter, and is used to study the segregation and mixing characteristics in a riser. It was shown that (i) for the specific cases we studied, particle polydispersity has a negligible effect on the time-averaged axial solid concentration profiles but has a notable effect on the particle velocity distributions, (ii) the experimental hydrodynamics as well as segregation and mixing patterns in a riser with a continuous particle size distribution can be predicted reasonably well by present combined TFM-EMMS-PBM method. (C) 2013 Elsevier B.V. All rights reserved. |
| WOS标题词 | Science & Technology ; Technology |
| 类目[WOS] | Engineering, Environmental ; Engineering, Chemical |
| 研究领域[WOS] | Engineering |
| 关键词[WOS] | DIRECT QUADRATURE METHOD ; CIRCULATING FLUIDIZED-BEDS ; POPULATION BALANCE ; SIZE DISTRIBUTION ; KINETIC-THEORY ; TURBULENT FLUIDIZATION ; EULERIAN SIMULATION ; MULTIPHASE FLOW ; BUBBLE-COLUMNS ; FCC PARTICLES |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000328588300022 |
| 公开日期 | 2015-05-27 |
| 源URL | [http://ir.ipe.ac.cn/handle/122111/13758]  |
| 专题 | 过程工程研究所_研究所（批量导入） |
| 作者单位 | 1.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 |
| 推荐引用方式 GB/T 7714 | Chen, Xizhong,Wang, Junwu,Li, Jinghai. Coarse grid simulation of heterogeneous gas-solid flow in a CFB riser with polydisperse particles[J]. CHEMICAL ENGINEERING JOURNAL,2013,234(0):173-183. |
| APA | Chen, Xizhong,Wang, Junwu,&Li, Jinghai.(2013).Coarse grid simulation of heterogeneous gas-solid flow in a CFB riser with polydisperse particles.CHEMICAL ENGINEERING JOURNAL,234(0),173-183. |
| MLA | Chen, Xizhong,et al."Coarse grid simulation of heterogeneous gas-solid flow in a CFB riser with polydisperse particles".CHEMICAL ENGINEERING JOURNAL 234.0(2013):173-183. |
入库方式： OAI收割
来源：过程工程研究所
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