ABSTRACT
In practice the authors more usually encounter non-stationary situations and the problem is to forecast and to calculate the kinetics of the mass transfer. They also utilises quasi-stationary state approach to describe the processes of evaporation from porous bodies and their drying. Evaporation from films may significantly change the distribution of solutes during evaporation and the concentration Cm near to the meniscus. Surfactants are often used to suppress or depress evaporation from a free surface. When the intensity of the field increases further, a corona discharge is generated that changes the mechanism of evaporation from capillaries and intensifies the drying of porous bodies. The action of the field of corona discharge considerably accelerates the evaporation as compared to the non-uniform electric field. Evaporation leads to an increase in concentration of a non-volatile component of the solution in the region of evaporation. To remove non-volatile liquids from porous bodies, the methods of sucking out through porous filters are usually used.
