A comparison of two-fluid model, dense discrete particle model and CFD-DEM method for modeling impinging gas-solid flows
文献类型：期刊论文
| 作者 | Chen, Xizhong1,2; Wang, Junwu1 |
| 刊名 | POWDER TECHNOLOGY
 |
| 出版日期 | 2014-03-01 |
| 卷号 | 254期号:1页码:94-102 |
| 关键词 | Multiphase flow Gas-solid flow Granular materials Fluidization Computational fluid dynamics Impinging flow |
| ISSN号 | 0032-5910 |
| 其他题名 | Powder Technol. |
| 中文摘要 | Gas-solid flows have been numerically investigated by various multiphase models, none of which is suitable for all the problems encountered in industries. Different multiphase models have been chosen by different researchers to meet their specific requirements; therefore, it is highly desirable to have a comprehensive understanding of the merits and drawbacks of these models. In this study, three existing multiphase models, including a two-fluid model (TFM), a dense discrete particle model (DDPM) and a combined computational fluid dynamics and discrete element model (CFD-DEM) method, are compared by simulating the flow patterns of impinging particle jet in a channel. Depending on the solid concentration used, the particle jets can either merge into a single jet or cross through each other (particle trajectory crossing effect) when they are impinging. The TFM and the DDPM methods have the advantage of less computational demanding compared to the CFD-DEM method, with the cost of more uncertainties. Using the simulation results obtained from the CFD-DEM method as the benchmark data, it was shown that (i) the TFM fails to predict the well-known particle trajectory crossing effect in any cases as in previous studies (Desjardins et al., Journal of Computational Physics 2008, 227, 2514-2539) but can reproduce the merging cases reasonably well; (ii) the DDPM fails to predict the cases where the two particle jets are emerging due to the over-simplified treatment of particle-particle interactions, highlighting the requirement of a proper way to represent the realistic particle-particle interactions and the importance of volume exclusion effect (the particles cannot overlap) in dense gas-solid flows; and (iii) quantitative comparisons show there are major differences between the results predicted by the three models, highlighting the requirement of further improvement of DDPM and TFM. (C) 2014 Elsevier B.V. All rights reserved. |
| 英文摘要 | Gas-solid flows have been numerically investigated by various multiphase models, none of which is suitable for all the problems encountered in industries. Different multiphase models have been chosen by different researchers to meet their specific requirements; therefore, it is highly desirable to have a comprehensive understanding of the merits and drawbacks of these models. In this study, three existing multiphase models, including a two-fluid model (TFM), a dense discrete particle model (DDPM) and a combined computational fluid dynamics and discrete element model (CFD-DEM) method, are compared by simulating the flow patterns of impinging particle jet in a channel. Depending on the solid concentration used, the particle jets can either merge into a single jet or cross through each other (particle trajectory crossing effect) when they are impinging. The TFM and the DDPM methods have the advantage of less computational demanding compared to the CFD-DEM method, with the cost of more uncertainties. Using the simulation results obtained from the CFD-DEM method as the benchmark data, it was shown that (i) the TFM fails to predict the well-known particle trajectory crossing effect in any cases as in previous studies (Desjardins et al., Journal of Computational Physics 2008, 227, 2514-2539) but can reproduce the merging cases reasonably well; (ii) the DDPM fails to predict the cases where the two particle jets are emerging due to the over-simplified treatment of particle-particle interactions, highlighting the requirement of a proper way to represent the realistic particle-particle interactions and the importance of volume exclusion effect (the particles cannot overlap) in dense gas-solid flows; and (iii) quantitative comparisons show there are major differences between the results predicted by the three models, highlighting the requirement of further improvement of DDPM and TFM. (C) 2014 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-BEDS ; MP-PIC METHOD ; NUMERICAL-SIMULATION ; GRANULAR FLOW ; MOMENT METHOD ; FORMULATIONS ; COMPUTATION ; DYNAMICS ; PATTERNS ; GELDART |
| 收录类别 | SCI |
| 原文出处 | |
| 语种 | 英语 |
| WOS记录号 | WOS:000333883800012 |
| 公开日期 | 2014-08-28 |
| 版本 | 出版稿 |
| 源URL | [http://ir.ipe.ac.cn/handle/122111/10891]  |
| 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. A comparison of two-fluid model, dense discrete particle model and CFD-DEM method for modeling impinging gas-solid flows[J]. POWDER TECHNOLOGY,2014,254(1):94-102. |
| APA | Chen, Xizhong,&Wang, Junwu.(2014).A comparison of two-fluid model, dense discrete particle model and CFD-DEM method for modeling impinging gas-solid flows.POWDER TECHNOLOGY,254(1),94-102. |
| MLA | Chen, Xizhong,et al."A comparison of two-fluid model, dense discrete particle model and CFD-DEM method for modeling impinging gas-solid flows".POWDER TECHNOLOGY 254.1(2014):94-102. |
入库方式： OAI收割
来源：过程工程研究所
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