“Droplet” problem in the aspect of modern thermal technologies

Abstract

The study presents the combined analytical and numerical method, which allows researching phase trans-formations of dispersed liquid without reference to droplet size limitation. Phase transformations of conductively heated cold water droplets were examined; the universal curves of the change of liquid thermal state and phase transformations in Fourrier number - based time interval were determined. These curves represent temperature variation of infinite set of various size droplets, having the same initial temperature in the case of conductive heating, as the influence of Knudsen layer on transfer processes can be neglected. Deviation from these curves, as droplets evaporate in complicated boundary conditions, allows evaluating the influence of droplet slip velocity, radiation, absorbed in semitransparent liquid and Knudsen layer on droplet heating and evaporation processes.