Effect of surface for es on diffusion in a liquid at the initial time interval of film evolution

The flow of a film of a viscous liquid is considered. The liquid is a weak solution containing a gas phase and a volatile surfactant. The distribution of the latter in the layer is controlled by the diffusion in the liquid volume, the adsorption–desorption processes between the liquid volume and the adsorbed near-surface layer, and the evaporation from the surface into the boundary gaseous medium. The process of penetration of the gas phase from the external flow of the gas flow is specified by the diffusion inside the film.