Rotational motion of a droplet induced by interfacial tension

Abstract

Spontaneous rotation of a droplet induced by the Marangoni flow is analyzed in a two-dimensional system. The droplet with the small particle which supplies a surfactant at the interface is considered. We calculated flow field around the droplet using Stokes equation and found that advective nonlinearity breaks symmetry for rotation. Theoretical calculation indicates that the droplet spontaneously rotates when the radius of the droplet is an appropriate size. The theoretical results were validated through comparison with the experiments.

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Cited by in corpus (7)

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• Getting drowned in a swirl: deformable bead-spring model microswimmers in external flow fields
• Bifurcation in the angular velocity of a circular disk propelled by symmetrically distributed camphor pills