EXPERIMENTAL DETERMINATION OF TRANSIENT WALL TEMPERATURE DISTRIBUTIONS CLOSE TO GROWING VAPOR BUBBLES

摘要

The experiment was realised to study the spatio-temporal temperature variation underneath growing bubbles on a thin platinum heating foil in saturated and subcooled nucleate pool boiling of water at atmospheric pressure. High spatial and time resolution of the transient wall temperature distribution close to the growing vapour bubbles was achieved with application of a high-speed video camera and a high-speed infrared camera which were synchronised at a frequency of 1000 frames/second. This paper studies the transient wall temperature distribution underneath growing bubbles with the fast and slow bubble detachment mechanisms in saturated and subcooled pool boiling.