Evaporation rate of a suspended droplet in hot air flow containing water vapor (1st report, droplet of water and water-soluble liquid)

摘要

The influence of environmental water vapor on the evaporation rate of a liquid droplet has been examined by suspending single droplets of distilled water and ethanol in hot air flow containing water vapor. The experimental results indicate that when the droplet is of distilled water and the air flow temperature far exceeds the boiling point, the evaporation rate constant is not affected by the water vapor in the air. In contrast, when the droplet is composed of ethanol, the evaporation rate constant increases with the addition of water vapor to the air flow.