Heating and Evaporation of Mono-component Droplets

Abstract

The models used for the analysis of mono-component droplet heating and evaporation in this chapter assume that vapour in the vicinity of the droplet surface is saturated. Hence, the rate of droplet evaporation is equal to the rate of vapour diffusion from its surface to ambient gas. These are known as the hydrodynamic models of droplet evaporation. The analysis starts with empirical correlations which are not directly linked with any evaporation model. Then classical hydrodynamic models of droplet evaporation are described. All of these models assume that the droplet’s radius remains constant during the time step but changes from one time step to another due to droplet thermal swelling and evaporation. Then the effects of droplet radii change during individual time steps on the heating process are investigated. Approaches to modelling heating and evaporation of spheroidal droplets are presented. Previously developed tools for modelling radiative heating of droplets are adapted to modelling the effects of support on droplet heating and evaporation. Comparisons with experimental results are described.