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Maheshwari, Shantanu; van der Hoef, Martin; Prosperetti, Andrea; Lohse, Detlef

Molecular dynamics study of multicomponent droplet dissolution in a sparingly miscible liquid. (English) Zbl 1419.76637

J. Fluid Mech. 833, 54-69 (2017).
Summary: The dissolution of a multicomponent nanodrop in a sparingly miscible liquid is studied by molecular dynamics (MD) simulations. We studied both binary and ternary systems, in which nanodroplets are formed from one and two components, respectively. Whereas for a single-component droplet the dissolution can easily be calculated, the situation is more complicated for a multicomponent drop, as the interface concentrations of the drop constituents depend on the drop composition, which changes with time. In this study, the variation of the interface concentration with the drop composition is determined from independent ‘numerical experiments’, which are then used in the theoretical model for the dissolution dynamics of a multicomponent drop. The MD simulations reveal that when the interaction strengths between the drop constituents and the surrounding bulk liquid are significantly different, the concentration of the more soluble component near the drop interface may become larger than in the drop bulk. This effect is the larger the smaller the drop radius. While the present study is limited to binary and ternary systems, the same method can be easily extended to a larger number of components.

MSC:

76T10 Liquid-gas two-phase flows, bubbly flows

Keywords:

drops; drops and bubbles

Software:

Gromacs
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References:

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