Auto-oscillation of surface tension.
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.
Kovalchuk
V I
VI
Institute of Biocolloid Chemistry, Kiev, Ukraine.
Kamusewitz
H
H
Vollhardt
D
D
Kovalchuk
N M
NM