Hemispherical droplet of liquid water-lying on flat surface

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A hemispherical droplet of liquid water, lying on a flat surface, evaporates by molecular diffusion through still air surrounding the droplet. The droplet initially has a radius R. As the liquid water slowly evaporates, the droplet shrinks slowly with time, but the flux of the water vapor is at a nominal steady state. The temperature of the droplet and the surrounding still air are kept constant. The air contains water vapor at a infinitely long distance from the droplet's surface.

What is the simplified differential form of Fick's equation for water vapor (species A)?

Reference no: EM13711870

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