Numerical modeling of interphase instability in a plane layer of a reacting fluid

Marangoni convection resulting from the transport of a surfactant across a gas-liquid interface is investigated numerically using a model of a two-dimensional horizontal layer of a viscous fluid on a solid surface, with the free surface of the fluid being in contact with an ambient gas medium. A surface-active component of the gas is absorbed by the liquid layer and desorbed from it, and a monomolecular chemical reaction takes place between the liquid and the surfactant. It is found that, even for Ma=1000, the interphase convection makes it possible to obtain a mass transfer acceleration coefficient that is equal to approximately 30 percent of its maximum value.