Multi-channel effect of condensation flow in a micro triple-channel condenser
文献类型：期刊论文
| 作者 | Zhang, Wei1,2; Xu, Jinliang1; Liu, Guohua1,2 |
| 刊名 | international journal of multiphase flow
 |
| 出版日期 | 2008-12-01 |
| 卷号 | 34期号:12页码:1175-1184 |
| 关键词 | Condensation Multi-channel effect Flow pattern Microchannel Marangoni effect |
| ISSN号 | 0301-9322 |
| 通讯作者 | xujl@ms.giec.ac.cn |
| 中文摘要 | multi-channel effect is important to understand transport phenomenon in phase change systems with parallel channels. in this paper, visualization studies were performed to study the multi-channel effect in a silicon triple-channel condenser with an aspect ratio of 0.04. saturated water vapor was pumped into the microcondenser, which was horizontally positioned. the condenser was cooled by the air natural convention heat transfer in the air environment. flow patterns are either the annular flow at high inlet vapor pressures, or a quasi-stable elongated bubble at the microchannel upstream followed by a detaching or detached miniature bubble at smaller inlet vapor pressures. the downstream miniature bubble was detached from the elongated bubble tip induced by the maximum weber number there. it is observed that either a single vapor thread or dual vapor threads are at the front of the elongated bubble. a miniature bubble is fully formed by breaking up the vapor thread or threads. the transient vapor thread formation and breakup process is exactly symmetry against the centerline of the center channel. in side channels, the marangoni effect induced by the small temperature variation over the channel width direction causes the vapor thread formation and breakup process deviating from the side channel centerline and approaching the center channel. the marangoni effect further forces the detached bubble to rotate and approach the center channel, because the center channel always has higher temperatures, indicating the multi-channel effect. |
| 英文摘要 | multi-channel effect is important to understand transport phenomenon in phase change systems with parallel channels. in this paper, visualization studies were performed to study the multi-channel effect in a silicon triple-channel condenser with an aspect ratio of 0.04. saturated water vapor was pumped into the microcondenser, which was horizontally positioned. the condenser was cooled by the air natural convention heat transfer in the air environment. flow patterns are either the annular flow at high inlet vapor pressures, or a quasi-stable elongated bubble at the microchannel upstream followed by a detaching or detached miniature bubble at smaller inlet vapor pressures. the downstream miniature bubble was detached from the elongated bubble tip induced by the maximum weber number there. it is observed that either a single vapor thread or dual vapor threads are at the front of the elongated bubble. a miniature bubble is fully formed by breaking up the vapor thread or threads. the transient vapor thread formation and breakup process is exactly symmetry against the centerline of the center channel. in side channels, the marangoni effect induced by the small temperature variation over the channel width direction causes the vapor thread formation and breakup process deviating from the side channel centerline and approaching the center channel. the marangoni effect further forces the detached bubble to rotate and approach the center channel, because the center channel always has higher temperatures, indicating the multi-channel effect. (c) 2008 elsevier ltd. all rights reserved. |
| WOS标题词 | science & technology ; technology |
| 类目[WOS] | mechanics |
| 研究领域[WOS] | mechanics |
| 关键词[WOS] | circular microchannels ; heat-transfer ; horizontal microchannels ; film condensation ; pressure-drop ; patterns ; square ; train ; model ; tube |
| 收录类别 | SCI |
| 资助信息 | natural science foundation of china [50776089]; national basic research program [2006cb601203] |
| 原文出处 | http://www.sciencedirect.com/science/journal/03019322 |
| 语种 | 英语 |
| WOS记录号 | WOS:000261281100008 |
| 公开日期 | 2010-09-23 |
| 源URL | [http://ir.giec.ac.cn/handle/344007/3406]  |
| 专题 | 中国科学院广州能源研究所 |
| 作者单位 | 1.Chinese Acad Sci, Micro Energy Syst Lab, Key Lab Renewable Energy & Gas Hydrate, Guangzhou Inst Energy Convers, Guangzhou 510640, Peoples R China 2.Chinese Acad Sci, Grad Univ, Beijing 100039, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhang, Wei,Xu, Jinliang,Liu, Guohua. Multi-channel effect of condensation flow in a micro triple-channel condenser[J]. international journal of multiphase flow,2008,34(12):1175-1184. |
| APA | Zhang, Wei,Xu, Jinliang,&Liu, Guohua.(2008).Multi-channel effect of condensation flow in a micro triple-channel condenser.international journal of multiphase flow,34(12),1175-1184. |
| MLA | Zhang, Wei,et al."Multi-channel effect of condensation flow in a micro triple-channel condenser".international journal of multiphase flow 34.12(2008):1175-1184. |
入库方式： OAI收割
来源：广州能源研究所
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