Explorations on the multi-scale flow structure and stability condition in bubble columns
文献类型：期刊论文
| 作者 | Yang, Ning; Chen, Jianhua; Zhao, Hui; Ge, Wei; Li, Jinghai |
| 刊名 | CHEMICAL ENGINEERING SCIENCE
 |
| 出版日期 | 2007-12-01 |
| 卷号 | 62期号:24页码:6978-6991 |
| 关键词 | bubble column multi-scale stability condition regime transition flow structure hydrodynamics |
| ISSN号 | 0009-2509 |
| 其他题名 | Chem. Eng. Sci. |
| 中文摘要 | Physical understanding of heterogeneous flow structure is of crucial importance for modelling and simulation of gas-liquid systems. This article presents a review and report of recent progress in our group on exploratory application of the variational (analytical) multi-scale approach to gas-liquid systems. The work features the closure of a hydrodynamic model with the incorporation of a stability condition reflecting the compromise between the dominant mechanisms in the system. A dual-bubble-size (DBS) model is proposed to approximate the heterogeneous structure of gas-liquid systems based on a single-bubble-size (SBS) model previously established. Reasonable variation of the gas holdup and the composition of the two bubble species with operating conditions have been calculated and the regime transition can therefore be reasonably predicted for air-water system, suggesting that stability condition may provide an insightful concept to explain the general tendencies in gas-liquid systems out of their hydrodynamic complexity, and to give simple models of their overall behaviors. Of course, the diversity of the correlations for drag force and minimum bubble size and the sensitivity of the model predictions to these correlations may suggest the necessity to clarify further the essential and robust results in the current model and to reduce the uncertainties involved. (C) 2007 Elsevier Ltd. All rights reserved. |
| 英文摘要 | Physical understanding of heterogeneous flow structure is of crucial importance for modelling and simulation of gas-liquid systems. This article presents a review and report of recent progress in our group on exploratory application of the variational (analytical) multi-scale approach to gas-liquid systems. The work features the closure of a hydrodynamic model with the incorporation of a stability condition reflecting the compromise between the dominant mechanisms in the system. A dual-bubble-size (DBS) model is proposed to approximate the heterogeneous structure of gas-liquid systems based on a single-bubble-size (SBS) model previously established. Reasonable variation of the gas holdup and the composition of the two bubble species with operating conditions have been calculated and the regime transition can therefore be reasonably predicted for air-water system, suggesting that stability condition may provide an insightful concept to explain the general tendencies in gas-liquid systems out of their hydrodynamic complexity, and to give simple models of their overall behaviors. Of course, the diversity of the correlations for drag force and minimum bubble size and the sensitivity of the model predictions to these correlations may suggest the necessity to clarify further the essential and robust results in the current model and to reduce the uncertainties involved. (C) 2007 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] | CHURN-TURBULENT REGIME ; COMPLEX-SYSTEMS ; EULERIAN SIMULATIONS ; DRAG COEFFICIENT ; INTERFACIAL AREA ; MASS-TRANSFER ; SCALE-UP ; GAS ; REACTORS ; LIQUID |
| 收录类别 | SCI ; ISTP |
| 原文出处 | |
| 语种 | 英语 |
| WOS记录号 | WOS:000251763600005 |
| 公开日期 | 2013-10-15 |
| 版本 | 出版稿 |
| 源URL | [http://ir.ipe.ac.cn/handle/122111/3492]  |
| 专题 | 过程工程研究所_研究所（批量导入） |
| 作者单位 | Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, Beijing 100080, Peoples R China |
| 推荐引用方式 GB/T 7714 | Yang, Ning,Chen, Jianhua,Zhao, Hui,et al. Explorations on the multi-scale flow structure and stability condition in bubble columns[J]. CHEMICAL ENGINEERING SCIENCE,2007,62(24):6978-6991. |
| APA | Yang, Ning,Chen, Jianhua,Zhao, Hui,Ge, Wei,&Li, Jinghai.(2007).Explorations on the multi-scale flow structure and stability condition in bubble columns.CHEMICAL ENGINEERING SCIENCE,62(24),6978-6991. |
| MLA | Yang, Ning,et al."Explorations on the multi-scale flow structure and stability condition in bubble columns".CHEMICAL ENGINEERING SCIENCE 62.24(2007):6978-6991. |
入库方式： OAI收割
来源：过程工程研究所
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