Boiling incipience and nucleate boiling heat transfer of highly wetting dielectric fluids from electronic materials

An experimental study of pool boiling was conducted, using cylindrical heater surfaces of platinum, silicon dioxide, and aluminum oxide. They were immersed in FC-72 and R-123 and saturated at 1-atm pressure. The effects of fluid and surface material on boiling incipience and on the nucleate boiling curve were investigated. A probabilistic representation is used to present the incipience wall superheat values, which scattered widely for ostensibly identical runs. The difference in incipience wall superheat values with FC-72 and R-113 is significant, but the surface material's effect on boiling incipience is small. The surface material effect is more pronounced in the nucleate boiling regime than in the incipience process.<
>