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Flow and heat transfer in microchannels with rough wall surface
Shen, S; Xu, JL; Zhou, JJ; Chen, Y
2006-07-01
Source PublicationENERGY CONVERSION AND MANAGEMENT
Volume47Issue:11-12Pages:1311-1325
AbstractExperiments were conducted to investigate the single phase convective heat transfer in a compact heat sink consisting of 26 rectangular microchannels of 300 mu m width and 800 mu m depth. The relative roughness is estimated to be 4-6%. Deionized water was used as the working fluid. Tests were performed with the Reynolds number range of 162-1257, the inlet liquid temperatures of 30, 50 and 70 degrees C and the heating powers of 140-450 W. The planform area is 5.0 x 1.53 cm(2). it is found that the friction factors and local and average Nusselt numbers significantly depart from those of conventional theories, possibly attributable to the surface roughness. The hydraulically developed but thermally developing flow results in decreased Nusselt numbers versus the non-dimensional axial distance. The temperature dependent fluid physical properties also influence the heat transfer characteristics to some extent. Correlations were provided for the friction factors and the Nusselt numbers. (c) 2005 Elsevier Ltd. All rights reserved.
SubtypeArticle
KeywordMicrochannels Surface Roughness Thermally Developing Flow Heat Transfer
WOS HeadingsScience & Technology ; Physical Sciences ; Technology
DOI10.1016/j.enconman.2005.09.001
WOS Subject ExtendedThermodynamics ; Energy & Fuels ; Mechanics ; Physics
WOS KeywordTRAPEZOIDAL SILICON MICROCHANNELS ; FRICTION FACTORS ; WATER-FLOW ; REFRIGERATORS
Indexed BySCI
Language英语
WOS SubjectThermodynamics ; Energy & Fuels ; Mechanics ; Physics, Nuclear
WOS IDWOS:000236522200001
Citation statistics
Cited Times:98[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.giec.ac.cn/handle/344007/10266
Collection中国科学院广州能源研究所
AffiliationChinese Acad Sci, Micro Energy Syst Lab, Guangzhou Inst Energy Convers, Guangzhou 510640, Guangdong, Peoples R China
Recommended Citation
GB/T 7714
Shen, S,Xu, JL,Zhou, JJ,et al. Flow and heat transfer in microchannels with rough wall surface[J]. ENERGY CONVERSION AND MANAGEMENT,2006,47(11-12):1311-1325.
APA Shen, S,Xu, JL,Zhou, JJ,&Chen, Y.(2006).Flow and heat transfer in microchannels with rough wall surface.ENERGY CONVERSION AND MANAGEMENT,47(11-12),1311-1325.
MLA Shen, S,et al."Flow and heat transfer in microchannels with rough wall surface".ENERGY CONVERSION AND MANAGEMENT 47.11-12(2006):1311-1325.
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