EVAPORATIVE COOLING DUE TO A GENTLY DEPOSITED DROPLET

The transient thermal behavior of a single water droplet gently deposi ted on the surface of a semi-infinite solid is investigated. A coupled model that solves simultaneously the transient conduction equation fo r the solid and thr liquid to yield the surface temperature and heat f lux distributions as well as the description of the droplet evaporatio n transient is proposed. The predictions of the evaporation time are c ompared with experimental data. An additional model is presented which assumes constant heat flux at the liquid-solid interface. This model provides a closed form solution for the solid surface transient temper ature distribution.