Statistical Rate Theory Approach on the Ethanol Droplet Evaporation Available to Purchase

The statistical rate theory (SRT) approach is derived and applied to predict the evaporation conditions of an ethanol droplet. In this study, a series of experiments of ethanol droplet evaporation at steady state have been conducted in an evaporation chamber. A temperature discontinuity is found across the liquid-vapor interface at the centerline during steady-state evaporation. The interfacial liquid temperature, the interfacial vapor temperature, the radius of droplet, and the average evaporation flux are used to predict the vapor-phase pressure. The predicted pressure is found to agree with the measured value. It is suggested that the SRT approach can predict the experimental evaporation conditions. As a factor in the SRT approach, the droplet radii are evaluated numerically. It is found that the radius with less than the micron scale significantly affects the vapor-phase pressure.