title: Auto-oscillation of surface tension.
abstract: Long-time auto-oscillation of the surface tension can evolve when in an aqueous system a diethyl phthalate droplet is placed under the free water surface. The experimental conditions for development of surface tension auto-oscillations are described. Based on a theoretical analysis the mechanism of these auto-oscillations is proposed. The mechanism of the auto-oscillations results from a switching between diffusion and convection transfer of diethyl phthalate in the solution. A periodic Marangoni flow on the water surface resulting from a surface layer instability is discussed. The solubility of the amphiphile in the water and its surface activity are the main characteristics that determine the system behavior.
authors.affiliation: Institute of Biocolloid Chemistry, Kiev, Ukraine.
authors.forename: V I
authors.initials: VI
authors.lastname: Kovalchuk
authors.forename: H
authors.initials: H
authors.lastname: Kamusewitz
authors.forename: D
authors.initials: D
authors.lastname: Vollhardt
authors.forename: N M
authors.initials: NM
authors.lastname: Kovalchuk