منابع مشابه
Stochastic Stokes’ drift
Classical Stokes’ drift is the small time-averaged drift velocity of suspended nondiffusing particles in a fluid due to the presence of a wave. We consider the effect of adding diffusion to the motion of the particles, and show in particular that a nonzero time-averaged drift velocity exists in general even when the classical Stokes’ drift is zero. Our results are obtained from a general proced...
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Stokes and Darwin drift, for irrotational waves and flow past rigid bodies, are analysed in a general framework and shown to be fundamentally the same thing.
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We derive the explicit analytic expression for the Stokes' drift in one dimension in the presence of a dichotomic Markov forcing. For small amplitudes of the forcing, the drift is enhanced, but the enhancement is reduced with increasing frequency of the forcing. On the other hand, a reduction of the drift or even a flux reversal can be induced at larger amplitudes, while the flux is now found t...
متن کاملStokes’ Drift of Linear Defects
A linear defect, viz. an elastic string, diffusing on a planar substrate traversed by a travelling wave experiences a drag known as Stokes’ drift. In the limit of an infinitely long string, such a mechanism is shown to be characterized by a sharp threshold that depends on the wave parameters, the string damping constant and the substrate temperature. Moreover, the onset of the Stokes’ drift is ...
متن کاملStochastic Stokes’ drift of a flexible dumbbell
We consider the stochastic Stokes’ drift of a flexible dumbbell. The dumbbell consists of two isotropic Brownian particles connected by a linear string 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. Interestingly, the depen...
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ژورنال
عنوان ژورنال: Journal of Fluid Mechanics
سال: 2019
ISSN: 0022-1120,1469-7645
DOI: 10.1017/jfm.2019.891