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    Subcooled Pool Film Boiling Heat Transfer From Spheres With Superhydrophobic Surfaces: An Experimental Study

    Source: Journal of Heat Transfer:;2016:;volume( 138 ):;issue: 002::page 21503
    Author:
    Fan, Li
    ,
    Li, Jia
    ,
    Su, You
    ,
    Wang, Huan
    ,
    Ji, Ting
    ,
    Yu, Zi
    DOI: 10.1115/1.4031303
    Publisher: The American Society of Mechanical Engineers (ASME)
    Abstract: Pool film boiling was studied by visualized quenching experiments on stainless steel spheres in water at the atmospheric pressure. The surfaces of the spheres were coated to be superhydrophobic (SHB), having a static contact angle greater than 160 deg. Subcooled conditions were concerned parametrically with the subcooling degree being varied from 0 آ°C (saturated) to 70 آ°C. It was shown that film boiling is the overwhelming mode of heat transfer during the entire course of quenching as a result of the retention of stable vapor film surrounding the SHB spheres, even at very low wall superheat that normally corresponds to nucleate boiling. Pool boiling heat transfer is enhanced with increasing the subcooling degree, in agreement with the thinning trend of the vapor film thickness. The heat flux enhancement was found to be up to fivefold for the subcooling degree of 70 آ°C in comparison to the saturated case, at the wall superheat of 200 آ°C. A modified correlation in the ratio form was proposed to predict pool film boiling heat transfer from spheres as a function of the subcooling degree.
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      Subcooled Pool Film Boiling Heat Transfer From Spheres With Superhydrophobic Surfaces: An Experimental Study

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    contributor authorFan, Li
    contributor authorLi, Jia
    contributor authorSu, You
    contributor authorWang, Huan
    contributor authorJi, Ting
    contributor authorYu, Zi
    date accessioned2017-05-09T01:30:01Z
    date available2017-05-09T01:30:01Z
    date issued2016
    identifier issn0022-1481
    identifier otherht_138_02_021503.pdf
    identifier urihttp://yetl.yabesh.ir/yetl/handle/yetl/161502
    description abstractPool film boiling was studied by visualized quenching experiments on stainless steel spheres in water at the atmospheric pressure. The surfaces of the spheres were coated to be superhydrophobic (SHB), having a static contact angle greater than 160 deg. Subcooled conditions were concerned parametrically with the subcooling degree being varied from 0 آ°C (saturated) to 70 آ°C. It was shown that film boiling is the overwhelming mode of heat transfer during the entire course of quenching as a result of the retention of stable vapor film surrounding the SHB spheres, even at very low wall superheat that normally corresponds to nucleate boiling. Pool boiling heat transfer is enhanced with increasing the subcooling degree, in agreement with the thinning trend of the vapor film thickness. The heat flux enhancement was found to be up to fivefold for the subcooling degree of 70 آ°C in comparison to the saturated case, at the wall superheat of 200 آ°C. A modified correlation in the ratio form was proposed to predict pool film boiling heat transfer from spheres as a function of the subcooling degree.
    publisherThe American Society of Mechanical Engineers (ASME)
    titleSubcooled Pool Film Boiling Heat Transfer From Spheres With Superhydrophobic Surfaces: An Experimental Study
    typeJournal Paper
    journal volume138
    journal issue2
    journal titleJournal of Heat Transfer
    identifier doi10.1115/1.4031303
    journal fristpage21503
    journal lastpage21503
    identifier eissn1528-8943
    treeJournal of Heat Transfer:;2016:;volume( 138 ):;issue: 002
    contenttypeFulltext
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    نرم افزار کتابخانه دیجیتال "دی اسپیس" فارسی شده توسط یابش برای کتابخانه های ایرانی | تماس با یابش
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