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    Infrared Visualization of the Cavity Effect Using Origami Inspired Surfaces

    Source: Journal of Heat Transfer:;2016:;volume( 138 ):;issue: 002::page 20901
    Author:
    Blanc, Mitchell J.
    ,
    Mulford, Rydge B.
    ,
    Jones, Matthew R.
    ,
    Iverson, Brian D.
    DOI: 10.1115/1.4032229
    Publisher: The American Society of Mechanical Engineers (ASME)
    Abstract: Surface temperature and apparent radiative surface properties (emissivity, absorptivity) may be controlled by varying surface topology through a phenomenon known as the cavity effect. Cavities created by origami folds offer the potential to achieve dynamic control of apparent radiative surface properties through actuation. To illustrate this phenomenon, a thin (0.0254 mm) stainlesssteel, specularly reflecting surface (emissivity, خµ = 0.117) was resistively heated (6.74 W). Accordionshaped folds (1.27 cm panels) were used to create Vshaped grooves that transition from 29آ° at the center to 180آ° near the edges. Thermocouples were attached to the center of each cavity panel (Figure (a)). An IR image of the surface (Figure (b)) reveals that the apparent temperature increases as the cavity angle decreases and is not necessarily indicative of the actual surface temperature. This increase is due to an increase in the number of specular reflections associated with the cavity effect. A similar folded surface was placed 7 cm from a blackbody radiator at 1000آ° C, to illustrate the change in apparent absorptivity with cavity angle. The cavity angle was held constant across the surface and varied between tests from 180آ° to 37آ° (Figure (c), top to bottom). The increase in apparent temperature is a direct result of the increase in apparent absorptivity for decreasing cavity angle, despite constant heating conditions.
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      Infrared Visualization of the Cavity Effect Using Origami Inspired Surfaces

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    contributor authorBlanc, Mitchell J.
    contributor authorMulford, Rydge B.
    contributor authorJones, Matthew R.
    contributor authorIverson, Brian D.
    date accessioned2017-05-09T01:30:11Z
    date available2017-05-09T01:30:11Z
    date issued2016
    identifier issn0022-1481
    identifier otherht_138_02_020901.pdf
    identifier urihttp://yetl.yabesh.ir/yetl/handle/yetl/161543
    description abstractSurface temperature and apparent radiative surface properties (emissivity, absorptivity) may be controlled by varying surface topology through a phenomenon known as the cavity effect. Cavities created by origami folds offer the potential to achieve dynamic control of apparent radiative surface properties through actuation. To illustrate this phenomenon, a thin (0.0254 mm) stainlesssteel, specularly reflecting surface (emissivity, خµ = 0.117) was resistively heated (6.74 W). Accordionshaped folds (1.27 cm panels) were used to create Vshaped grooves that transition from 29آ° at the center to 180آ° near the edges. Thermocouples were attached to the center of each cavity panel (Figure (a)). An IR image of the surface (Figure (b)) reveals that the apparent temperature increases as the cavity angle decreases and is not necessarily indicative of the actual surface temperature. This increase is due to an increase in the number of specular reflections associated with the cavity effect. A similar folded surface was placed 7 cm from a blackbody radiator at 1000آ° C, to illustrate the change in apparent absorptivity with cavity angle. The cavity angle was held constant across the surface and varied between tests from 180آ° to 37آ° (Figure (c), top to bottom). The increase in apparent temperature is a direct result of the increase in apparent absorptivity for decreasing cavity angle, despite constant heating conditions.
    publisherThe American Society of Mechanical Engineers (ASME)
    titleInfrared Visualization of the Cavity Effect Using Origami Inspired Surfaces
    typeJournal Paper
    journal volume138
    journal issue2
    journal titleJournal of Heat Transfer
    identifier doi10.1115/1.4032229
    journal fristpage20901
    journal lastpage20901
    identifier eissn1528-8943
    treeJournal of Heat Transfer:;2016:;volume( 138 ):;issue: 002
    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