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	Numerical simulations of interrupted and conventional microchannel heat sinks
	Xu, Jinliang1; Song, Yanxi1,2; Zhang, Wei1; Zhang, Hua3; Gan, Yunhua4
刊名	International journal of heat and mass transfer
	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
DOI	10.1016/j.ijheatmasstransfer.2008.05.003
通讯作者	Xu, jinliang(xujl@ms.giec.ac.cn)
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关键词	SINGLE-PHASE FLOW ; VISCOUS DISSIPATION
WOS研究方向	Thermodynamics ; Engineering ; Mechanics
WOS类目	Thermodynamics ; Engineering, Mechanical ; Mechanics
语种	英语
出版者	PERGAMON-ELSEVIER SCIENCE LTD
WOS记录号	WOS:000261628800019
内容类型	期刊论文
URI标识	http://www.corc.org.cn/handle/1471x/2387903
专题	中国科学院大学
通讯作者	Xu, Jinliang
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.

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