固体面上におかれた加熱水滴の突沸挙動 : 固体面ぬれ性の影響

概要

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In this report, the effect of wettability of solid surfaces against water on the ebullition behavior of superheated water droplets held on the solid surfaces, i. e. Pyrex glass, copper, 60/40 brass and phenol resin, was investigated under the transient superheated conditions during the course of the experiments. Considering the experimental results from the view point of the nucleation, an elaborate dimentionless parameter was introduced, which was largely effective in order to estimate the influence of temperature hysteresis of water droplets on the ebullition behavior, and the equation was presented to be useful to explain the fraction of droplets remaining without ebullition. Further, from the above mentioned equation the rate of nucleation with respect to each of solid surfaces was derived per unit area at the solid-water droplets interface, and it has been discussed from the standpoint of the wettability of solid surfaces against water.
1985-07-25