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Stochastic Stokes' drift of a flexible dumbbell

Kalvis M. Jansons
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Abstract

We consider the stochastic Stokes drift of a flexible dumbbell. The dumbbell consists of two isotropic Brownian particles connected by a linear spring with zero natural length, and is advected by a sinusoidal wave. We find an asymptotic approximation for the Stokes drift in the limit of a weak wave, and find good agreement with the results of a Monte Carlo simulation. We show that it is possible to use this effect to sort particles by their flexibility even when all the particles have the same diffusivity.

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Kalvis M. Jansons. 2007-03-22. Stochastic Stokes' drift of a flexible dumbbell. https://doi.org/10.1016/j.fluiddyn.2007.04.002

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