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    Numerical and Experimental Investigation of Laminar Channel Flow With a Transparent Wall

    Source: Journal of Heat Transfer:;2011:;volume( 133 ):;issue: 006::page 61701
    Author:
    Jing He
    ,
    Liping Liu
    ,
    Anthony M. Jacobi
    DOI: 10.1115/1.4003547
    Publisher: The American Society of Mechanical Engineers (ASME)
    Abstract: A numerical and experimental investigation is undertaken for developing laminar flow in a duct with one opaque, uniformly heated wall and one transparent wall. In the numerical model, mixed convection, radiative exchange, as well as two-dimensional conduction in the substrate are considered. Experiments are conducted in a high-aspect-ratio rectangular channel using infrared thermography to validate the numerical model and visualize the temperature field on a heated surface. An extended parametric study using the validated model is also carried out to assess the impact of channel height, and thermal conductivity and thickness of the substrate. For a channel height of H=6 mm and a heating power of qs=257 W/m2, as Re increases from 150 to 940 the fraction of heat transfer by convection from the heated surface rises from 65% to 79%. At Re=150, as H increases from 6 mm to 25 mm, radiation from the heated surface increases from 35% to 70% of the total heating power. The influence of substrate conductivity and thickness on local flux distributions is limited to regions near the channel inlet and outlet. Over the entire parametric space considered, radiation loss from the interior duct surfaces to the inlet and outlet apertures is less than 2% of the total heat input and thus unimportant.
    keyword(s): Temperature , Heat transfer , Channels (Hydraulic engineering) , Radiation (Physics) , Computer simulation , Flow (Dynamics) , Temperature distribution , Transparency , Heat , Heat conduction , Thermal conductivity , Convection , Reynolds number , Channel flow , Equations AND Thickness ,
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      Numerical and Experimental Investigation of Laminar Channel Flow With a Transparent Wall

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    http://yetl.yabesh.ir/yetl1/handle/yetl/146676
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    contributor authorJing He
    contributor authorLiping Liu
    contributor authorAnthony M. Jacobi
    date accessioned2017-05-09T00:45:01Z
    date available2017-05-09T00:45:01Z
    date copyrightJune, 2011
    date issued2011
    identifier issn0022-1481
    identifier otherJHTRAO-27915#061701_1.pdf
    identifier urihttp://yetl.yabesh.ir/yetl/handle/yetl/146676
    description abstractA numerical and experimental investigation is undertaken for developing laminar flow in a duct with one opaque, uniformly heated wall and one transparent wall. In the numerical model, mixed convection, radiative exchange, as well as two-dimensional conduction in the substrate are considered. Experiments are conducted in a high-aspect-ratio rectangular channel using infrared thermography to validate the numerical model and visualize the temperature field on a heated surface. An extended parametric study using the validated model is also carried out to assess the impact of channel height, and thermal conductivity and thickness of the substrate. For a channel height of H=6 mm and a heating power of qs=257 W/m2, as Re increases from 150 to 940 the fraction of heat transfer by convection from the heated surface rises from 65% to 79%. At Re=150, as H increases from 6 mm to 25 mm, radiation from the heated surface increases from 35% to 70% of the total heating power. The influence of substrate conductivity and thickness on local flux distributions is limited to regions near the channel inlet and outlet. Over the entire parametric space considered, radiation loss from the interior duct surfaces to the inlet and outlet apertures is less than 2% of the total heat input and thus unimportant.
    publisherThe American Society of Mechanical Engineers (ASME)
    titleNumerical and Experimental Investigation of Laminar Channel Flow With a Transparent Wall
    typeJournal Paper
    journal volume133
    journal issue6
    journal titleJournal of Heat Transfer
    identifier doi10.1115/1.4003547
    journal fristpage61701
    identifier eissn1528-8943
    keywordsTemperature
    keywordsHeat transfer
    keywordsChannels (Hydraulic engineering)
    keywordsRadiation (Physics)
    keywordsComputer simulation
    keywordsFlow (Dynamics)
    keywordsTemperature distribution
    keywordsTransparency
    keywordsHeat
    keywordsHeat conduction
    keywordsThermal conductivity
    keywordsConvection
    keywordsReynolds number
    keywordsChannel flow
    keywordsEquations AND Thickness
    treeJournal of Heat Transfer:;2011:;volume( 133 ):;issue: 006
    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