Variation by Time in Boiling Heat Transfer Caused by Generation of Bubbles

Abstract

The behaviors of boiling bubble and boiling heat transfer are much connected with each other, and usually it is said that the turbulence in liquid as caused by boiling bubbling is very effective for heat transfer. But we found in this experiment that this effect is not so great, and that the effect of a bubble contacting with the heating surface is very great. We acertained this fact by the experiment in which the boiling bubble or the air bubble was contacted with the fine heating wire and in which the measurement of the temperature of the wire and photography of bubbles by a high speed camera were conducted at the same time.