National Taiwan Ocean University Institutional Repository:Item 987654321/26168
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Please use this identifier to cite or link to this item: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/26168

Title: An analysis of turbulent film boiling on a sphere with variable wall temperature
Authors: Hai-Ping Hu
Contributors: 國立臺灣海洋大學:輪機工程學系
Keywords: variation wall temperature;vapor;radiatio
Date: 2008-08-01
Issue Date: 2011-10-20T08:34:20Z
Publisher: Journal of Mechanical Engineering Science
Abstract: Abstract:The present theoretical study investigates turbulent film boiling on a sphere immersed in a stagnant saturated liquid. By assuming the cosine function, the condition of variable wall temperature is expressed. The study includes the analysis of non-linear vapour velocity, vapour temperature, thermal property, and Eddy diffusivity in the vapour film; the radiation effect, temperature ratio, and the Rayleigh number are all considered. The result shows that in a free-convection film, when film boiling has higher Rayleigh number, the turbulent film boiling has a better heat transfer efficiency than the laminar one. Finally, a comparison between the results of the present study and those reported in previous studies is presented. It is found that a good agreement exists between them.
Relation: 222(8), pp.1515-1521
URI: http://ntour.ntou.edu.tw/handle/987654321/26168
Appears in Collections:[Department of Marine Engineering] Periodical Articles

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