A multiscale mass transfer model for gas-solid riser flows: Part 1 - Sub-grid model and simple tests
文献类型：期刊论文
| 作者 | Dong, Weigang1,2; Wang, Wei1,2; Li, Jinghai1,2 |
| 刊名 | CHEMICAL ENGINEERING SCIENCE
 |
| 出版日期 | 2008-05-01 |
| 卷号 | 63期号:10页码:2798-2810 |
| 关键词 | mass transfer multiscale sub-grid cluster computational fluid dynamics simulation circulating fluidized bed |
| ISSN号 | 0009-2509 |
| 其他题名 | Chem. Eng. Sci. |
| 中文摘要 | The gas-solid mass transfer in circulating fluidized bed (CFB) riser flow is both structure-dependent and dynamic in nature. Recent progress in multiscale computational fluid dynamics (CFD) allows fresh insight into the dynamic flow structure, yet its influence on the mass transfer remains to be settled. To this end, a multiscale mass transfer model is established in this paper based on the extended framework of the energy-minimization multiscale (EMMS) model. The relevant algorithm named EMMS/mass is proposed for CFD-coupled mass transfer computation. Two testing cases accounting for sublimation of naphthalene and decomposition of ozone, respectively, are presented to demonstrate the characters of the model. It is shown that structural consideration can have significant effects on the model prediction. The normally used Reynolds number is not adequate to characterize these effects, while the combination of gas velocity and solids flux seems to capture the structural effects and allows to explain the variation of Sherwood number reported for CFB risers in the literature. Sub-grid coupling of this multiscale mass transfer model and CFD approach can be expected to provide a promising tool to probe the dynamic and structure-dependent nature of mass transfer in CFB risers. (C) 2008 Elsevier Ltd. All rights reserved. |
| 英文摘要 | The gas-solid mass transfer in circulating fluidized bed (CFB) riser flow is both structure-dependent and dynamic in nature. Recent progress in multiscale computational fluid dynamics (CFD) allows fresh insight into the dynamic flow structure, yet its influence on the mass transfer remains to be settled. To this end, a multiscale mass transfer model is established in this paper based on the extended framework of the energy-minimization multiscale (EMMS) model. The relevant algorithm named EMMS/mass is proposed for CFD-coupled mass transfer computation. Two testing cases accounting for sublimation of naphthalene and decomposition of ozone, respectively, are presented to demonstrate the characters of the model. It is shown that structural consideration can have significant effects on the model prediction. The normally used Reynolds number is not adequate to characterize these effects, while the combination of gas velocity and solids flux seems to capture the structural effects and allows to explain the variation of Sherwood number reported for CFB risers in the literature. Sub-grid coupling of this multiscale mass transfer model and CFD approach can be expected to provide a promising tool to probe the dynamic and structure-dependent nature of mass transfer in CFB risers. (C) 2008 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 ; OZONE DECOMPOSITION REACTION ; LOW REYNOLDS-NUMBERS ; PACKED-BED ; TRANSFER COEFFICIENT ; HEAT-TRANSFER ; CATALYTIC REACTOR ; LARGE PARTICLES ; 2-PHASE FLOW ; CFD APPROACH |
| 收录类别 | SCI |
| 原文出处 | |
| 语种 | 英语 |
| WOS记录号 | WOS:000256489000019 |
| 公开日期 | 2013-10-08 |
| 版本 | 出版稿 |
| 源URL | [http://ir.ipe.ac.cn/handle/122111/2737]  |
| 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.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Dong, Weigang,Wang, Wei,Li, Jinghai. A multiscale mass transfer model for gas-solid riser flows: Part 1 - Sub-grid model and simple tests[J]. CHEMICAL ENGINEERING SCIENCE,2008,63(10):2798-2810. |
| APA | Dong, Weigang,Wang, Wei,&Li, Jinghai.(2008).A multiscale mass transfer model for gas-solid riser flows: Part 1 - Sub-grid model and simple tests.CHEMICAL ENGINEERING SCIENCE,63(10),2798-2810. |
| MLA | Dong, Weigang,et al."A multiscale mass transfer model for gas-solid riser flows: Part 1 - Sub-grid model and simple tests".CHEMICAL ENGINEERING SCIENCE 63.10(2008):2798-2810. |
入库方式： OAI收割
来源：过程工程研究所
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