Application of the 3rd-order Polynomial Temperature Profile Liquid Model in Predicting Droplet Vaporizing

A 3rd-order polynomial temperature profile liquid model for droplet evaporation was proposed recently, in which the enhancement of heat transport by internal circulation was correctly reflected due to the introduction of Hill's vortex. Thus it could predict droplet temperature and evaporation rate well. Based on this well-built liquid evaporation model, this paper investigated the effect of initial parameters including initial droplet temperature and ambient gas velocity on droplet evaporation rate. It was found that the initial gas velocity had a larger effect on droplet evaporation rate and temperature distribution than the initial droplet temperature. Further, several kinds of liquid droplets (n-Decane, n-Heptane and n-Dodecane) were employed to study liquid viscosity on droplet evaporation. The result indicated that a smaller viscosity of liquid droplet could lead to a larger droplet evaporation rate and a greater temperature gradient inside droplet in the transient evaporation period.