Abstract
The evaporation of water droplet is relevant to numerous technologically important applications, such as fire suppression, industrial cooling and so on. For the saturated water droplets in wet steam, the numerical analysis of evaporation process caused by laser radiation is studied. The water droplet is assumed to be spherical and semitransparent to radiation. Based on the traditional model of water droplet evaporation, a simplified physical model is developed and mathematical model equations are set up, which include radiative transfer equations, energy equations and mass transfer equations. Considering the effect of thermophysical parameters varied with temperature on evaporation process, the change law of some parameters is obtained, which include evaporating rate, droplet mass and droplet diameter. The influence law of various initial diameter and laser intensity to evaporation process is explored under this consideration, too. The numerical analysis of single water droplet evaporation plays an important role for further study of mechanism study of wetness measurement by laser-induced vaporization enhanced photoacoustics method.
