Abstract
The combined transient heat and mass transfer during the evaporation of a superheated stationary droplet, surrounded by its own saturated vapor, is numerically investigated. The droplet and its surrounding vapor are assumed to contain a tracer amount of the transferred species. The effects of important physical parameters, when the partition coefficient of the transferred species is much larger than one, are examined. It is shown that, over a wide range of parameters, mass transfer is gas-side controlled. The mass transfer resistance associated with the vapor layer resulting from the droplet evaporation controls the droplet-vapor mass transfer, and can reduce the rate, or even reverse the direction, of mass transfer in the droplet.
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