Analysis of Surface Temperature and Evaporation Rate of Inkjet Droplets After Impact

Abstract

Measurements of evaporation rate and temperature drop are simultaneously carried out while a sessile droplet evaporates on a PET film. Evaporation of inkjet droplets is a complex phenomenon involving airflow, temperature and vapour diffusion. As the evaporation of droplets is dominated by vapour diffusion and the saturated vapour concentration at the droplet surface depends on the droplet surface temperature, it is important to understand the surface temperature drop due to evaporation. The relationship between droplet size, evaporation rate and surface temperature drop is discussed through experiments and numerical calculations.