Numerical simulations of interrupted and conventional microchannel heat sinks
文献类型：期刊论文
| 作者 | Xu, Jinliang1; Song, Yanxi1,2; Zhang, Wei1; Zhang, Hua3; Gan, Yunhua4 |
| 刊名 | international journal of heat and mass transfer
 |
| 出版日期 | 2008-12-01 |
| 卷号 | 51期号:25-26页码:5906-5917 |
| 关键词 | Numerical simulation Microchannel heat sink Heat transfer enhancement Pressure drop reduction |
| ISSN号 | 0017-9310 |
| 通讯作者 | xujl@ms.giec.ac.cn |
| 中文摘要 | we provide three-dimensional numerical simulations of conjugate heat transfer in conventional and the newly proposed interrupted microchannel heat sinks. the new microchannel heat sink consists of a set of separated zones adjoining shortened parallel microchannels and transverse microchambers. multi-channel effect, physical property variations, and axial thermal conduction are considered. it is found that flow rate variations in different channels can be neglected, while heat received by different channels accounts for 2% deviations from the averaged value when the heat flux at the back surface of the silicon chip reaches 100 w/cm(2). the computed hydraulic and thermal boundary layers are redeveloping in each separated zone due to shortened flow length for the interrupted microchannel heat sink. the periodic thermal developing flow is responsible for the significant heat transfer enhancement. two effects influence pressure drops across the newly proposed microchannel heat sink. the first one is the pressure recovery effect in the microchamber, while the second one is the head loss when liquid leaves the microchamber and enters the next zone. the first effect compensates or suppresses the second one, leading to similar or decreased pressure drop than that for the conventional microchannel heat sink, with the fluid prandtl number larger than unity. |
| 英文摘要 | we provide three-dimensional numerical simulations of conjugate heat transfer in conventional and the newly proposed interrupted microchannel heat sinks. the new microchannel heat sink consists of a set of separated zones adjoining shortened parallel microchannels and transverse microchambers. multi-channel effect, physical property variations, and axial thermal conduction are considered. it is found that flow rate variations in different channels can be neglected, while heat received by different channels accounts for 2% deviations from the averaged value when the heat flux at the back surface of the silicon chip reaches 100 w/cm(2). the computed hydraulic and thermal boundary layers are redeveloping in each separated zone due to shortened flow length for the interrupted microchannel heat sink. the periodic thermal developing flow is responsible for the significant heat transfer enhancement. two effects influence pressure drops across the newly proposed microchannel heat sink. the first one is the pressure recovery effect in the microchamber, while the second one is the head loss when liquid leaves the microchamber and enters the next zone. the first effect compensates or suppresses the second one, leading to similar or decreased pressure drop than that for the conventional microchannel heat sink, with the fluid prandtl number larger than unity. (c) 2008 elsevier ltd. all rights reserved. |
| WOS标题词 | science & technology ; physical sciences ; technology |
| 类目[WOS] | thermodynamics ; engineering, mechanical ; mechanics |
| 研究领域[WOS] | thermodynamics ; engineering ; mechanics |
| 关键词[WOS] | single-phase flow ; viscous dissipation |
| 收录类别 | SCI |
| 资助信息 | national natural science foundation of china [50476088]; shanghai key discipline project [t0503] |
| 原文出处 | http://www.sciencedirect.com/science/journal/00179310 |
| 语种 | 英语 |
| WOS记录号 | WOS:000261628800019 |
| 公开日期 | 2010-09-23 |
| 源URL | [http://ir.giec.ac.cn/handle/344007/3400]  |
| 专题 | 中国科学院广州能源研究所 |
| 作者单位 | 1.Chinese Acad Sci, Guangzhou Inst Energy Convers, Key Lab Renewable Energy & Gas Hydrate, Micro Energy Syst Lab, Guangzhou 510640, Peoples R China 2.Chinese Acad Sci, Grad Sch, Beijing 100080, Peoples R China 3.Shanghai Univ Sci & Technol, Inst Refrigerat & Cryogen, Shanghai 201800, Peoples R China 4.S China Univ Technol, Sch Elect Power, Guangzhou 510641, Peoples R China |
| 推荐引用方式 GB/T 7714 | Xu, Jinliang,Song, Yanxi,Zhang, Wei,et al. Numerical simulations of interrupted and conventional microchannel heat sinks[J]. international journal of heat and mass transfer,2008,51(25-26):5906-5917. |
| APA | Xu, Jinliang,Song, Yanxi,Zhang, Wei,Zhang, Hua,&Gan, Yunhua.(2008).Numerical simulations of interrupted and conventional microchannel heat sinks.international journal of heat and mass transfer,51(25-26),5906-5917. |
| MLA | Xu, Jinliang,et al."Numerical simulations of interrupted and conventional microchannel heat sinks".international journal of heat and mass transfer 51.25-26(2008):5906-5917. |
入库方式： OAI收割
来源：广州能源研究所
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