Abstract
A system of two emulsion droplets is examined as they mutually approach at small separations. The mass transfer of diffusion-controlled surfactants towards the interface is regarded. The cases of a surfactant soluble in only one of the phases as well as in all of them are analysed. Quantitative estimates are presented for the tangential mobility of the droplet/thin layer interface. Different regimes of mass transfer and flow in the drops and a creeping flow and various regimes of mass transfer in the thin layer between them are considered.
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