Experiments were made of impinging droplets on a heated vertical surface in a range of low droplet Weber numbers mostly from 10 to 200. Data of the heat transfer effectiveness of individual droplets measured by means of a transient technique are presented. When the wall superheat is higher than a certain value, the droplet rebounds away from the surface with a very low heat transfer effectiveness. Behavior of the droplets on the surface was observed and heat transfer characteristics during the residence time of a droplet on the high temperature surface were examined based on the time-dependent variation of the wall temperature measured near the surface.
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UEDA et al. (1979) studied this question.