K. S. Kolegov
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A mathematical model is proposed in this work. It describes mass transfer in a droplet of a colloidal solution evaporating from a horizontal
impermeable substrate with the contact line pinned. The model takes
into account viscous, gravitational and capillary forces. A numerical
solution of the problem for drops of two extremely different volumes
is performed. In both cases, the concentration of suspended particles
increases in the region of the contact line, which is explained by compensative flow transfer. The difference is observed only as a free surface
of the drop.
Keywords: Mass transfer, colloidal solution, drop, evaporation.
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