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2017-05-08

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Please use this identifier to cite or link to this item: https://hdl.handle.net/2445/123361

Entropic rectification and current inversion in a pulsating channel

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Abstract

We show the existence of a resonant behavior of the current of Brownian particles confined in a pulsating channel. The interplay between the periodic oscillations of the shape of the channel and a force applied along its axis leads to an increase of the particle current as a function of the diffusion coefficient. A regime of current inversion is also observed for particular values of the oscillation frequency and the applied force. The model proposed is based on the Fick-Jacobs equation in which the entropic barrier and the effective diffusion coefficient depend on time. The phenomenon observed could be used to optimize transport in microfluidic devices or biological channels.

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https://doi.org/10.1063/1.4982884

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Partícules (Matèria), Equació de la calor

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Particles, Heat equation

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Articles publicats en revistes (Física de la Matèria Condensada)

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CARUSELA, M. Florencia and RUBÍ CAPACETI, José Miguel. Entropic rectification and current inversion in a pulsating channel. Journal of Chemical Physics. 2017. Vol. 146, num. 18, pags. 184901-1-184901-7. ISSN 0021-9606. [consulted: 11 of October of 2026]. Available at: https://hdl.handle.net/2445/123361

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