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Please use this identifier to cite or link to this item: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/41902

Title: Void Fraction Measurements During Saturated Pool Boiling of Water on Partially Wetted Vertical Surfaces
Authors: S. P. Liaw;V. K. Dhir
Contributors: 國立臺灣海洋大學:機械與機電工程學系
Date: 1989-01
Issue Date: 2017-04-11T06:32:24Z
Publisher: J. Heat Transfer
Abstract: Abstract:Void fraction profiles adjacent to a vertical wall 6.3 cm wide and 10.3 cm high were measured during nucleate boiling. The experiments were conducted in saturated water at 1 atm pressure. In the experiments, the wettability of the surface was varied by controlling the degree of oxidation of the surface. Static contact angle was used as an indicator of the surface wettability. The void fraction was measured with a gamma densitometer. The experimental results show that the maximum void fraction occurs about 1–1.5 mm away from the heater surface. The wall void fraction, the maximum void fraction, and the thickness of the void layer increase with wall heat flux. It is found that for a given heat flux, the wall void fraction increases as the surface becomes less wettable, whereas the maximum heat flux decreases with increase in contact angle.
Relation: 111(3) pp.731-738
URI: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/41902
Appears in Collections:[機械與機電工程學系] 期刊論文

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