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Second law analysis of curved rectangular channels

文献类型：期刊论文

作者Guo, Jiangfeng1,2; Xu, Mingtian1; Cheng, Lin1
刊名INTERNATIONAL JOURNAL OF THERMAL SCIENCES
出版日期2011-05-01
卷号50期号:5页码:760-768
关键词Curved rectangular channels Entropy generation Numerical simulation Field synergy principle Laminar flow Heat transfer
英文摘要The thermodynamic performance of the curved rectangular channels in laminar flow is numerically investigated in terms of entropy generation. The classical Navier-Stokes equations are adopted, and water is selected as the working fluid. The results show that the geometric parameters have important influences on the heat transfer performance of the channel flows. For the channels with the same cross-section, the Nusselt number increases significantly as the curvature ratio increases at the expense of slight increase of pressure drop; the dimensionless total entropy generation generally tends to reduce as Reynolds number grows, and decreases as the curvature ratio increases at the same Reynolds number. The dimensionless total entropy generation lessens with the reduction of cross-sectional area at the same Reynolds number in the channels with the same radius of curvature. Despite the rapid drop of the Bejan number, we have not found the optimal flow regime for curved rectangular channel laminar flows. The local heat transfer and fluid friction entropy generations mainly occur in the narrow region near the walls, especially the outer wall. The field synergy principle provides an alternative way to explain the heat transfer enhancement mechanism for the curved rectangular channel flows. (C) 2010 Elsevier Masson SAS. All rights reserved.
WOS标题词Science & Technology ; Physical Sciences ; Technology
类目[WOS]Thermodynamics ; Engineering, Mechanical
研究领域[WOS]Thermodynamics ; Engineering
关键词[WOS]CONVECTIVE HEAT-TRANSFER ; FORCED-CONVECTION ; MICRO-CHANNELS ; FLUID-FLOW ; MICROCHANNELS ; PIPE ; EXCHANGERS ; DUCTS ; TUBES
收录类别SCI
语种英语
WOS记录号WOS:000288823700012
公开日期2015-12-22
源URL[http://ir.etp.ac.cn/handle/311046/106517]  
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.Shandong Univ, Inst Thermal Sci & Technol, Jinan 250061, Peoples R China
2.Chinese Acad Sci, Inst Engn Thermophys, Beijing 100190, Peoples R China
推荐引用方式
GB/T 7714		 Guo, Jiangfeng,Xu, Mingtian,Cheng, Lin. Second law analysis of curved rectangular channels[J]. INTERNATIONAL JOURNAL OF THERMAL SCIENCES,2011,50(5):760-768.
APA Guo, Jiangfeng,Xu, Mingtian,&Cheng, Lin.(2011).Second law analysis of curved rectangular channels.INTERNATIONAL JOURNAL OF THERMAL SCIENCES,50(5),760-768.
MLA Guo, Jiangfeng,et al."Second law analysis of curved rectangular channels".INTERNATIONAL JOURNAL OF THERMAL SCIENCES 50.5(2011):760-768.

入库方式： OAI收割

来源：工程热物理研究所

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