人工キャビティの配置が沸騰面での気泡離脱頻度と熱伝達に与える影響

抄録

Bubbles in the boiling on a solid surface is generally generated from the nucleation gas bubble in a small cavity, which is inevitable on the manufactured surface. Increase in the number density of the cavity results in an increased density of the bubble nucleation, leading to a higher heat transfer coefficient. In this study the interactions between neighboring bubbles are investigated in order to clarify its effect on the departure frequency of the bubbles in the pool boiling on the horizontal surface. From the visualization, the liquid flow induced behind the departing bubble should enhance of the departure of the neighboring bubble. The vertical vibration of the bubble also correlated with the departure of the neighboring bubble. The downward motion of the bubble is related with upward motion, that is, the departure of the neighboring bubble.