Abstract:
The bubble diameter of FC3284, FC84 and their mixtures
during pool boiling were measured with a dual-probe which was
located at a certain distance from the heating surface. In this
study, temperature controlled heating surface was used. The
difference between heating surface and saturation temperatures
was increased gradually to obtain entire pool boiling regions at
atmospheric pressure. Along the entire boiling curve, vapor
bubble diameter was determined at that specified point. First of
all, bubble diameter was determined for pure substances and
their binary mixtures respectively. Different bubble diameters
were determined in the different pool boiling regions. The results
were compared with each other and with existing correlations in
literature. It was found out that surface tension, viscosity and
wall superheat are important factors which may affect the bubble
departure diameter. At the beginning of the nucleate boiling, the
results were in agreement with some related correlations in the
literature and bubble diameters for pure substances FC3284 and
FC84 were lower when compared to that of their binary
mixtures.
Description:
Papers presented to the 12th International Conference on Heat Transfer, Fluid Mechanics and Thermodynamics, Costa de Sol, Spain on 11-13 July 2016.
