Comparison between molar- and mass-based approaches to drop evaporation modelling

Abstract

Three evaporation models for single-component liquid drop floating in a gaseous environment are compared: two of them rely on the widely used assumption of constant (molar or mass) density and yield an explicit formula for the evaporation rate, while the third model relieves the constant density hypothesis yielding an implicit form of the evaporation rate. The comparison is made for a relative wide range of temperature and pressure operating conditions and for three liquids: water, n-octane and n-dodecane.