| Abstract: | The hydrodynamic instability of a film flow of a weak solution containing a soluble volatile surfactant is investigated. Diffusion
of the surfactant in the liquid, its evaporation into the boundary gas medium, and the adsorption and desorption processes
in the near-surface layer are taken into account. A system of evolutionary equations is derived and a steady-state solution
film flow along a vertical surface and the stability of this flow are investigated for the simultaneous action of body and
capillary forces and the Marangoni effect. Hydrodynamic and diffusion instability modes are detected and their properties
are investigated for constant and variable surfactant concentration in the adsorbed sublayer.
Moscow, Madrid. Translated from Izvestiya Rossiiskoi Akademii Nauk, Mekhanika Zhidkosti i Gaza, No. 4, pp. 56–67, July–August,
2000.
The work was carried out with support from the Russian Foundation for Basic Research (project No. 97-01-00153) and the Spanish
Ministry of Higher Education (program DGICYT (Spain), project No. PB 96-599). |
