Spreading dynamics of reactive surfactants driven by Marangoni convection
Langue
en
Article de revue
Ce document a été publié dans
Soft Matter. 2019-05-14, vol. 15, n° 18, p. 3644-3648
Royal Society of Chemistry
Résumé en anglais
We consider the spreading dynamics of some insoluble surface-active species along an aqueous interface. The model includes both diffusion, Marangoni convection and first-order reaction kinetics. An exact solution of the ...Lire la suite >
We consider the spreading dynamics of some insoluble surface-active species along an aqueous interface. The model includes both diffusion, Marangoni convection and first-order reaction kinetics. An exact solution of the nonlinear transport equations is derived in the regime of large Schmidt number, where viscous effects are dominant. We demonstrate that the variance of the surfactant distribution increases linearly with time, providing an unambiguous definition for the enhanced diffusion coefficient observed in the experiments. The model thus presents new insight regarding the actuation of camphor grains at the water-air interface.< Réduire
Mots clés en anglais
enhanced diffusion
Marangoni convection
camphor boats
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