Abstract
Nucleation inception due to conductive heating in composite droplets: experimental observations and modelling
Highlights
Bubble nucleation inception is a physical phenomenon that characterises the onset of a phase transition process in a liquid
When the time required for superheating the liquid is shorter than the time that is required for bubble shedding from the interface, TONB is higher than the equilibrium saturation temperature (Tsat)
Since no special treatment was applied to the liquids, it is reasonable to assume that there are impurities and dissolved gasses within the liquids that serve as nucleation sites. These nucleation sites lower the energy barrier that is required for nucleation inception, the superheating degrees that were obtained in the current experiments varied between a few degrees and up to about 15 degrees
Summary
Bubble nucleation inception is a physical phenomenon that characterises the onset of a phase transition process in a liquid. The purpose of the research is to predict the nucleation temperature due to an isobaric process under slow to moderate heating rates for composite droplets. In our previous studies [4][5], focused on rapid pool boiling, we identified three regions for the nucleation temperature depending on the heating rate (fast, intermediate and slow). A thermodynamic model, taking into account kinetic issues, was developed for the fast region for various pure liquids at atmospheric pressure (106
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