Experimental study on formation of phase interface during water boiling on cylindrical surfaces of various diameters
N.V. Kukshinov, A.A. Dmitrieva, L.I. Meteleshko, D.N. Morskoy
Bauman Moscow State Technical University, Moscow, Russia
Keywords: bubbly boiling, detachment diameter, bubble growth rate, high-speed video recording, statistic distributions
Abstract
Experiments were performed on formation of phase interface for a case of distilled water boiling on cylindrical surfaces with the diameter of 1 and 3 mm. During the experiment, a bubble boiling regime was ensured, these bubbles are detected with the high-speed PSV (Particle Shadow Velocimetry) technique with 8000 f.p.s. rate. Data processing provides for bubble size distribution and defines the mean separation diameter and the bubble growth rate as a function of heat flux. The effect of the boiling surface curvature on boiling characteristics was evaluated.
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