Phase transfer in a droplet-solid sphere collision

Heat and mass transfer of evaporation by collisions between droplets and solid particles can be significantly different under different conditions and could be affected by many factors, such as, the diameter ratio of solid and droplet, the hydrodynamic characteristics of the droplet, temperature difference between solids and droplet, the geometry curvature, the bridge effect of two or three balls and off-center condition. However, the reported studies on the droplet impacting onto the solid sphere are very limited. Thus a systemic research is very important and meaningful. This study presents the effect of impact of a droplet upon the solid sphere under different conditions and compare the experimental results with modeling to see whether it can be validated. Both experimental methods and analytical modeling approaches have been included in this study.