{
  "id": "cond-mat/0505017",
  "version": "v1",
  "published": "2005-05-01T16:17:06.000Z",
  "updated": "2005-05-01T16:17:06.000Z",
  "title": "Flow-induced currents in nanotubes: a Brownian dynamics approach",
  "authors": [
    "Moumita Das",
    "Sriram Ramaswamy",
    "A. K. Sood",
    "G. Ananthakrishna"
  ],
  "comment": "7 pages, 9 figures",
  "categories": [
    "cond-mat.stat-mech"
  ],
  "abstract": "Motivated 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.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2005-05-01T16:17:06.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "brownian dynamics approach",
      "flow-induced currents",
      "shear rate",
      "average drift velocity initially rises",
      "flow field induces"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 7,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "adsabs": "2005cond.mat..5017D"
    }
  }
}