Heat transfer data for individual water droplets impinging upon a heat surface are presented. The droplet diameters ranged from 200 to 400 pm, and the approach velocities from 8 to 33 ft/s The effect of surface temperature variation from the saturation temperature to 1800°F was studied. Photographs of the impingement process are presented which show that even the small droplets studied break up upon impingement at moderate approach velocities. The heat transfer dam show that approach velocity is the dominant variable affecting droplet heat transfer and that surface temperature has little effect on heat transfer in the non-wetting regime.
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