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    Conjugate Thermal Analysis of Air-Cooled Discrete Flush-Mounted Heat Sources in a Horizontal Channel

    Source: Journal of Electronic Packaging:;2011:;volume( 133 ):;issue: 004::page 41001
    Author:
    Jing He
    ,
    Liping Liu
    ,
    Anthony M. Jacobi
    DOI: 10.1115/1.4005299
    Publisher: The American Society of Mechanical Engineers (ASME)
    Abstract: Thermal analysis with comprehensive treatment of conjugate heat transfer is performed in this study for discrete flush-mounted heat sources in a horizontal channel cooled by air. The numerical model accounts for mixed convection, radiative exchange and two-dimensional conduction in the substrate. The model is first used to simulate available experimental work to demonstrate its accuracy and practical utility. A parametric study is then undertaken to assess the effects of Reynolds number, surface emissivity of walls and heat sources, as well as thickness and thermal conductivity of substrate, on flow field and heat transfer characteristics. It is shown that due to radiative heat transfer, the wall temperatures are brought closer, and the trend of temperature variation along the top wall is significantly altered. Such effects are more pronounced for higher surface emissivity and/or lower Reynolds numbers. The influence of substrate conductivity and thickness is related in that a large value of either substrate conductivity or thickness facilitates redistribution of heat and tends to yield a uniform temperature field in the substrate. For highly conductive or thick substrate, the “hot spot” cools down and may occur in upstream sources. Radiation loss to the ambient increases with substrate conductivity and thickness due to the elevated temperature near the openings, yet the total heat transfer over the bottom surface by convection and radiation remains essentially unaltered.
    keyword(s): Channels (Hydraulic engineering) , Radiation (Physics) , Heat , Temperature , Emissivity , Convection , Thermal analysis , Heat conduction , Flow (Dynamics) , Computer simulation , Heat transfer , Thickness , Temperature distribution , Reynolds number AND Mixed convection ,
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      Conjugate Thermal Analysis of Air-Cooled Discrete Flush-Mounted Heat Sources in a Horizontal Channel

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    http://yetl.yabesh.ir/yetl1/handle/yetl/145762
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    contributor authorJing He
    contributor authorLiping Liu
    contributor authorAnthony M. Jacobi
    date accessioned2017-05-09T00:43:05Z
    date available2017-05-09T00:43:05Z
    date copyrightDecember, 2011
    date issued2011
    identifier issn1528-9044
    identifier otherJEPAE4-26319#041001_1.pdf
    identifier urihttp://yetl.yabesh.ir/yetl/handle/yetl/145762
    description abstractThermal analysis with comprehensive treatment of conjugate heat transfer is performed in this study for discrete flush-mounted heat sources in a horizontal channel cooled by air. The numerical model accounts for mixed convection, radiative exchange and two-dimensional conduction in the substrate. The model is first used to simulate available experimental work to demonstrate its accuracy and practical utility. A parametric study is then undertaken to assess the effects of Reynolds number, surface emissivity of walls and heat sources, as well as thickness and thermal conductivity of substrate, on flow field and heat transfer characteristics. It is shown that due to radiative heat transfer, the wall temperatures are brought closer, and the trend of temperature variation along the top wall is significantly altered. Such effects are more pronounced for higher surface emissivity and/or lower Reynolds numbers. The influence of substrate conductivity and thickness is related in that a large value of either substrate conductivity or thickness facilitates redistribution of heat and tends to yield a uniform temperature field in the substrate. For highly conductive or thick substrate, the “hot spot” cools down and may occur in upstream sources. Radiation loss to the ambient increases with substrate conductivity and thickness due to the elevated temperature near the openings, yet the total heat transfer over the bottom surface by convection and radiation remains essentially unaltered.
    publisherThe American Society of Mechanical Engineers (ASME)
    titleConjugate Thermal Analysis of Air-Cooled Discrete Flush-Mounted Heat Sources in a Horizontal Channel
    typeJournal Paper
    journal volume133
    journal issue4
    journal titleJournal of Electronic Packaging
    identifier doi10.1115/1.4005299
    journal fristpage41001
    identifier eissn1043-7398
    keywordsChannels (Hydraulic engineering)
    keywordsRadiation (Physics)
    keywordsHeat
    keywordsTemperature
    keywordsEmissivity
    keywordsConvection
    keywordsThermal analysis
    keywordsHeat conduction
    keywordsFlow (Dynamics)
    keywordsComputer simulation
    keywordsHeat transfer
    keywordsThickness
    keywordsTemperature distribution
    keywordsReynolds number AND Mixed convection
    treeJournal of Electronic Packaging:;2011:;volume( 133 ):;issue: 004
    contenttypeFulltext
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    DSpace software copyright © 2002-2015  DuraSpace
    نرم افزار کتابخانه دیجیتال "دی اسپیس" فارسی شده توسط یابش برای کتابخانه های ایرانی | تماس با یابش
    yabeshDSpacePersian