Abstract
An equation is developed for the rate of evaporation of a liquid droplet sitting on or adhering to an impermeable wall bounding a gas flow. The equation applies to droplets which are small enough to be spherical segments and to lie within the linear portion of the velocity profile. A fundamental approach is taken, starting with the convervation equation for droplet vapor and applying the boundary layer approximation. For a two-dimensional droplet of small thickness, the analysis yields a solution which gives the Sherwood number, the dimensionless mass transfer rate, as a function of the Peclet number, the ratio of convection to diffusion transfer rates
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