Abstract
We carry out an experimental study with a special interest on growing and collapsing processes of vapor bubbles in subcooled pool. We examine the boiling phenomenon on copper block with using pure water. We especially focus on the microbubble emission boiling (MEB). The MEB is a phenomenon in which the heat flux exceeds the CHF accompanying with a formation of small bubbles of the order of 10^<-6> m and a radial emission of those bubbles from the heated surface. We propose a model that is named 'Core-periphery model.' This model shows a correlation between behaviors of the vapor bubbles and the characteristics of the heat transfer over the heated surface.
