Coarse grid simulation of heterogeneous gas-solid flow in a CFB riser with EMMS drag model: Effect of inputting drag correlations
文献类型：期刊论文
| 作者 | Zhou, Quan1,2; Wang, Junwu1
|
| 刊名 | POWDER TECHNOLOGY
 |
| 出版日期 | 2014-02-01 |
| 卷号 | 253期号:1页码:486-495 |
| 关键词 | EMMS drag model Meso-scale structures Multiphase flow Powder technology Multiphase reactors Fluidization |
| ISSN号 | 0032-5910 |
| 其他题名 | Powder Technol. |
| 中文摘要 | Two-fluid model combined with Energy-Minimization Multi-Scale (EMMS) drag model has been accepted as an effective method to simulate the hydrodynamics of heterogeneous gas-solid flow in circulating fluidized beds. In the EMMS drag model, a drag correlation obtained from homogeneous fluidization and/or packed bed, denoted as traditional drag correlation, is necessary to describe the homogeneous gas-solid interactions within three (dilute-phase, dense-phase and inter-phase) sub-systems. In this article we study the effects of different traditional drag correlations on the effective inter-phase drag force of clustered gas-solid flow within the framework of EMMS drag model, and their consequent effects on CFD results. It was shown that due to the proper consideration of meso-scale structural effect, CFD results using the EMMS drag model are in a reasonable agreement with experimental data (including radial and axial solid concentration profiles and root mean square of local solid concentration), and are slightly affected by different inputting traditional drag correlations. Present conclusion is quite different from the one obtained in previous studies, where coarse grid simulation with traditional drag correlation failed to predict the hydrodynamics of CFB risers and was sensitive to the traditional drag correlation used. Therefore, the EMMS drag model appears as an advantage over traditional drag correlations, since it is not only insensitive to the empirical input, but also gives much better agreement with experiments. (C) 2013 Elsevier B.V. All rights reserved. |
| 英文摘要 | Two-fluid model combined with Energy-Minimization Multi-Scale (EMMS) drag model has been accepted as an effective method to simulate the hydrodynamics of heterogeneous gas-solid flow in circulating fluidized beds. In the EMMS drag model, a drag correlation obtained from homogeneous fluidization and/or packed bed, denoted as traditional drag correlation, is necessary to describe the homogeneous gas-solid interactions within three (dilute-phase, dense-phase and inter-phase) sub-systems. In this article we study the effects of different traditional drag correlations on the effective inter-phase drag force of clustered gas-solid flow within the framework of EMMS drag model, and their consequent effects on CFD results. It was shown that due to the proper consideration of meso-scale structural effect, CFD results using the EMMS drag model are in a reasonable agreement with experimental data (including radial and axial solid concentration profiles and root mean square of local solid concentration), and are slightly affected by different inputting traditional drag correlations. Present conclusion is quite different from the one obtained in previous studies, where coarse grid simulation with traditional drag correlation failed to predict the hydrodynamics of CFB risers and was sensitive to the traditional drag correlation used. Therefore, the EMMS drag model appears as an advantage over traditional drag correlations, since it is not only insensitive to the empirical input, but also gives much better agreement with experiments. (C) 2013 Elsevier B.V. All rights reserved. |
| WOS标题词 | Science & Technology ; Technology |
| 类目[WOS] | Engineering, Chemical |
| 研究领域[WOS] | Engineering |
| 关键词[WOS] | CIRCULATING FLUIDIZED-BED ; FCC PARTICLES ; MESOSCALE STRUCTURES ; EULERIAN SIMULATION ; HYDRODYNAMICS ; COEFFICIENT ; CLUSTERS ; STRESSES ; WALL |
| 收录类别 | SCI |
| 原文出处 | |
| 语种 | 英语 |
| WOS记录号 | WOS:000332430600063 |
| 公开日期 | 2014-05-06 |
| 版本 | 出版稿 |
| 源URL | [http://ir.ipe.ac.cn/handle/122111/8052]  |
| 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 | Zhou, Quan,Wang, Junwu. Coarse grid simulation of heterogeneous gas-solid flow in a CFB riser with EMMS drag model: Effect of inputting drag correlations[J]. POWDER TECHNOLOGY,2014,253(1):486-495. |
| APA | Zhou, Quan,&Wang, Junwu.(2014).Coarse grid simulation of heterogeneous gas-solid flow in a CFB riser with EMMS drag model: Effect of inputting drag correlations.POWDER TECHNOLOGY,253(1),486-495. |
| MLA | Zhou, Quan,et al."Coarse grid simulation of heterogeneous gas-solid flow in a CFB riser with EMMS drag model: Effect of inputting drag correlations".POWDER TECHNOLOGY 253.1(2014):486-495. |
入库方式： OAI收割
来源：过程工程研究所
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