Evaluation of drag models for cocurrent and countercurrent gas-solid flows
文献类型：期刊论文
| 作者 | Ullah, Atta1,2; Wang, Wei1; Li, Jinghai1 |
| 刊名 | CHEMICAL ENGINEERING SCIENCE
 |
| 出版日期 | 2013-04-05 |
| 卷号 | 92期号:0页码:89-104 |
| 关键词 | Chemical reactors Fluidization Mathematical modelling Multiphase flow Meso-scale Simulation |
| 英文摘要 | Gas-solid systems, whether cocurrent or countercurrent, manifest meso-scale heterogeneity to some extent. However, most of the previous modelling efforts, including the study of the effects of meso-scale structures as well as relevant drag closures, are mainly focused on cocurrent up riser flows, leaving cocurrent down and countercurrent systems less explored. In this work, by extending drift flux analysis and experimental validation for cocurrent down and countercurrent flow systems, we show that the most commonly used homogeneous drag models may be successful in a certain range of operating conditions, especially with fine-grid resolution. Fine-grid resolution is indeed helpful for reliable simulation of coexisting states, by predicting concave slip velocity curves. By comparison, the energy minimization multiscale (EMMS) drag model allows the use of much coarser grid resolution and better prediction over wider range of operating conditions. Its predictability of the overall slip velocity as well as the drift flux is nearly grid independent over the entire range of voidage. This fact leads us to the obvious advantage of saving computational time. (C) 2013 Elsevier Ltd. 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 ; MULTISCALE CFD APPROACH ; FULLY-DEVELOPED REGION ; PARTICLE FLOW ; NUMERICAL-SIMULATION ; RISER REACTORS ; DOWNER REACTOR ; KINETIC-THEORY ; 2-FLUID MODEL ; EMMS APPROACH |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000316670400007 |
| 公开日期 | 2015-05-27 |
| 源URL | [http://ir.ipe.ac.cn/handle/122111/13379]  |
| 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, EMMS Grp, State Key Lab Multiphase Complex Syst, Beijing 100190, Peoples R China 2.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Ullah, Atta,Wang, Wei,Li, Jinghai. Evaluation of drag models for cocurrent and countercurrent gas-solid flows[J]. CHEMICAL ENGINEERING SCIENCE,2013,92(0):89-104. |
| APA | Ullah, Atta,Wang, Wei,&Li, Jinghai.(2013).Evaluation of drag models for cocurrent and countercurrent gas-solid flows.CHEMICAL ENGINEERING SCIENCE,92(0),89-104. |
| MLA | Ullah, Atta,et al."Evaluation of drag models for cocurrent and countercurrent gas-solid flows".CHEMICAL ENGINEERING SCIENCE 92.0(2013):89-104. |
入库方式： OAI收割
来源：过程工程研究所
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