Effect of Pressure on Bubble Growth in Pool Boiling

Abstract

The effect of system pressure upon the growth characteristics of an isolated vapor bubble was investigated experimentally using water, ethanol and carbon-tetrachloride. The Jakob number was varied between 0.34 and 1040. It was found that with an increasing pressure the growth rate tends to be smaller, while in low pressure region the growth exponent happens to exceed 0.5. The model of evaporation of a thin liquid layer beneath the bubble was examined, which turned out to be successful for the explanation of the experimental facts.