Mass transfer across fluid interfaces-modeling the influence of adsorbed surfactant (Mathematical Analysis of Viscous Incompressible Fluid)

Abstract

This note reports on an extended sharp-interface model for two-phase flows with mass transfer which accounts for the effect of interface contamination with surface active agents (surfactants). Besides the influence on mass transfer mediated by the back-effect of the adsorbed surfactant onto the hydrodynamics via changes in interfacial tension, this model also describes the local hindrance of mass transfer due to interface coverage in a thermodynamically consistent way. Depending on the interfacial free energy, the latter is closely related to Langmuir s energy barrier model.