Evaporative Cooling Due to a Gently Deposited Droplet

The transient thermal behavior of a single water droplet gently deposited on the surface of a semi-infinite solid is investigated. A coupled model that solves simultaneously the transient conductionequation for the solid and the liquid to yield the surface temperature and heat flux distributions as well as the description of the droplet evaporation transient is proposed. The predictions of the evaporation time are compared with experimental data. An additional model is presented which assumes constant heat fluxat the liquid-solid interface. This model provides a closed form solution for the solid surface transient temperature distribution