Flow-induced currents in nanotubes: a Brownian dynamics approach

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dc.creatorDas, Moumita
dc.creatorRamaswamy, Sriram
dc.creatorSood, A. K.
dc.creatorAnanthakrishna, G.
dc.date2005-05-01
dc.date.accessioned2026-07-07T03:04:59Z
dc.date.available2026-07-07T03:04:59Z
dc.descriptionMotivated by recent experiments [Science {\bf 299}, 1042 (2003)] reporting that carbon nanotubes immersed in a flowing fluid displayed an electric current and voltage, we numerically study the behaviour of a collection of Brownian particles in a channel, in the presence of a flow field applied on similar but slower particles in a wide chamber in contact with the channel. For a suitable range of shear rates, we find that the flow field induces a unidirectional drift in the confined particles, and is stronger for narrower channels. The average drift velocity initially rises with increasing shear rate, then shows saturation for a while, thereafter starts decreasing, in qualitative agreement with recent theoretical studies [Phys. Rev. B {\bf 70}, 205423 (2004)] based on Brownian drag and ``loss of grip''. Interestingly, if the sign of the interspecies interaction is reversed, the direction of the induced drift remains the same, but the flow-rate at which loss of grip occurs is lower, and the level of fluctuations is higher.
dc.description7 pages, 9 figures
dc.identifierhttps://arxiv.org/abs/cond-mat/0505017
dc.identifierhttp://arxiv.org/abs/cond-mat/0505017
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/26296
dc.subjectStatistical Mechanics
dc.titleFlow-induced currents in nanotubes: a Brownian dynamics approach
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