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|Title: ||Surface tension effects in turbulent film boiling on a horizontal elliptical tube|
|Authors: ||Hai-Ping Hu;Chi-Chang Wang;Cha’o-Kuang Chen|
|Keywords: ||surface tension;eccentricity;Rayleigh|
|Issue Date: ||2011-10-20T08:34:49Z
|Publisher: ||AIAA, Journal of Thermophysics and Heat Transfer|
|Abstract: ||Abstract:The present theoretical study investigates turbulent film boiling on an isothermal elliptical tube under free convection. The effects of surface tension, eccentricity and radiation are included in the analysis. Temperature, velocity and heat transfer characteristics are discussed. Temperature and velocity of the vapor film under the eddy diffusivity present the non-linear distribution. Besides, under higher eccentricity values, the eccentricity and the surface tension have only little influence on the mean Nusselt number. Furthermore, for film boiling with higher Rayleigh values, the elliptical tube can get better heat transfer efficiencies than a circular tube can. However, when Rayleigh values are low, the eccentricity of an elliptical tube seldom influences the heat transfer.|
|Relation: ||22(4), pp.598-603|
|Appears in Collections:||[輪機工程學系] 期刊論文|
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