A study of microlayer evaporation for three binary mixtures during nucleate boiling

Microlayer evaporation was studied both experimentally and theoretically for the binary solutions: 50 mol % methanol in water, 10 mol % methanol in water, and 3 mol % 1-butanol in water. Surface temperatures beneath the evaporating microlayer were measured as the solution was boiled on Pyrex. These were compared with temperatures calculated from a mathematical model. This model considered mass diffusion within the liquid layer and heat diffusion in the Pyrex and across the microlayer. The agreement between the experimental and calculated results demonstrates that mass transfer has a significant effect on the evaporation of the microlayer for these three cases.