Heat transfer enhancement in microchannel heat sinks with periodic expansion-constriction cross-sections

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	Heat transfer enhancement in microchannel heat sinks with periodic expansion-constriction cross-sections
	Chai, Lei 1,2; Xia, Guodong 1; Wang, Liang 2; Zhou, Mingzheng 1,3; Cui, Zhenzhen 1
刊名	INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
	2013-07-01
卷号	62 页码:741-751
关键词	Expansion-constriction Microchannel Heat transfer Thermal resistance
英文摘要	The heat transfer enhancement of microchannel heat sinks with periodic expansion-constriction cross-sections is investigated both experimentally and numerically. Each heat sink consists of 10 parallel microchannels with 0.1 mm wide and 0.2 mm deep in constant cross-section segment and each microchannel consists of an array of periodic expansion-constriction cross-sections. Three-dimensional laminar numerical simulations, based on the Navier-Stokes equations and energy equation, are obtained for pressure drop and heat transfer in these microchannel heat sinks under the same experimental conditions. Multi-channel effect, entrance effect, conjugate heat transfer, viscous heating and temperature dependent properties are considered. It is found that the numerical predictions of apparent friction factor and Nusselt number are in good agreement with experimental data. The influences of periodic expansion-constriction cross sections on pressure drop, heat transfer and thermal resistance are discussed, respectively. The effects of the entrance and exit plenum regions and the lateral parts of silicon wafer on fluid flow and heat transfer are discussed. Special attentions are given to analyze the variation of thermal resistance for each term with pumping power, corresponding to three stages of heat release at the substrate of heat sink. (C) 2013 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]	LONGITUDINAL FINS ; FLOW ; CHANNEL
收录类别	SCI
语种	英语
WOS记录号	WOS:000319085500078
公开日期	2015-12-22
内容类型	期刊论文
源URL	[http://ir.etp.ac.cn/handle/311046/98813]
专题	工程热物理研究所_中国科学院工程热物理所（论文库）_期刊论文（SCI）
作者单位	1.Beijing Univ Technol, Coll Environm & Energy Engn, Minist Educ, Key Lab Enhanced Heat Transfer & Energy Conservat, Beijing, Peoples R China 2.Chinese Acad Sci, Inst Engn Thermophys, Beijing, Peoples R China 3.State Nucl Power Technol R&D Ctr, Beijing, Peoples R China
推荐引用方式 GB/T 7714	Chai, Lei,Xia, Guodong,Wang, Liang,et al. Heat transfer enhancement in microchannel heat sinks with periodic expansion-constriction cross-sections[J]. INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER,2013,62:741-751.
APA	Chai, Lei,Xia, Guodong,Wang, Liang,Zhou, Mingzheng,&Cui, Zhenzhen.(2013).Heat transfer enhancement in microchannel heat sinks with periodic expansion-constriction cross-sections.INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER,62,741-751.
MLA	Chai, Lei,et al."Heat transfer enhancement in microchannel heat sinks with periodic expansion-constriction cross-sections".INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER 62(2013):741-751.