Direct numerical simulation of the dynamic behaviour of a system with a surfactant droplet under the free water surface: theoretical consideration of the auto-oscillation of surface tension

摘要: Numerical simulation of the dynamic behaviour a system containing surfactant droplet under free air-water surface is performed on basis set fluid mechanics equations, taking into account dynamics adsorption interface and Marangoni effect. The different in two time intervals. During long induction period convective transfer negligible, tension remains nearly constant parameters change rather slowly. After overcoming threshold, becomes unstable it results jump convection velocity, tension.