A study on micro bubbles in MEB

Abstract

Microbubble emission boiling (MEB) has attracted attention because of high heat flux exceeding CHF. Even though the subcooling conditions the fine bubbles do not condense, which shows that the bubbles should be non-condensable gasses. Therefore, in this paper, we carried out the boiling experiment by using ultra pure water and distilled water to examine the effect of dissolved gasses. And we discussed on the heat transfer mechanism of MEB based on the boiling curves and the observation of bubbles behaviors with use of high-speed camera. In both cases, we observed the fine bubbles in the subcooled water with little difference.