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    Heat Transfer Investigation of Air Flow in Microtubes—Part I: Effects of Heat Loss, Viscous Heating, and Axial Conduction

    Source: Journal of Heat Transfer:;2013:;volume( 135 ):;issue: 003::page 31703
    Author:
    Lin, Ting
    ,
    Kandlikar, Satish G.
    DOI: 10.1115/1.4007876
    Publisher: The American Society of Mechanical Engineers (ASME)
    Abstract: Experiments were conducted to investigate local heat transfer coefficients and flow characteristics of air flow in a 962 خ¼m inner diameter stainless steel microtube (minichannel). The effects of heat loss, axial heat conduction and viscous heating were systematically analyzed. Heat losses during the experiments with gas flow in small diameter tubes vary considerably along the flow length, causing the uncertainties to be very large in the downstream region. Axial heat conduction was found to have a significant effect on heat transfer at low Re. Viscous heating was negligible at low Re, but the effect was found to be significant at higher Re. After accounting for varying heat losses, viscous heating and axial conduction, Nu was found to agree very well with the predictions from conventional heat transfer correlations both in laminar and turbulent flow regions. No early transition to turbulent flow was found in the present study.
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      Heat Transfer Investigation of Air Flow in Microtubes—Part I: Effects of Heat Loss, Viscous Heating, and Axial Conduction

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    http://yetl.yabesh.ir/yetl1/handle/yetl/152034
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    contributor authorLin, Ting
    contributor authorKandlikar, Satish G.
    date accessioned2017-05-09T00:59:32Z
    date available2017-05-09T00:59:32Z
    date issued2013
    identifier issn0022-1481
    identifier otherht_135_3_031703.pdf
    identifier urihttp://yetl.yabesh.ir/yetl/handle/yetl/152034
    description abstractExperiments were conducted to investigate local heat transfer coefficients and flow characteristics of air flow in a 962 خ¼m inner diameter stainless steel microtube (minichannel). The effects of heat loss, axial heat conduction and viscous heating were systematically analyzed. Heat losses during the experiments with gas flow in small diameter tubes vary considerably along the flow length, causing the uncertainties to be very large in the downstream region. Axial heat conduction was found to have a significant effect on heat transfer at low Re. Viscous heating was negligible at low Re, but the effect was found to be significant at higher Re. After accounting for varying heat losses, viscous heating and axial conduction, Nu was found to agree very well with the predictions from conventional heat transfer correlations both in laminar and turbulent flow regions. No early transition to turbulent flow was found in the present study.
    publisherThe American Society of Mechanical Engineers (ASME)
    titleHeat Transfer Investigation of Air Flow in Microtubes—Part I: Effects of Heat Loss, Viscous Heating, and Axial Conduction
    typeJournal Paper
    journal volume135
    journal issue3
    journal titleJournal of Heat Transfer
    identifier doi10.1115/1.4007876
    journal fristpage31703
    journal lastpage31703
    identifier eissn1528-8943
    treeJournal of Heat Transfer:;2013:;volume( 135 ):;issue: 003
    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
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