{
  "id": "1206.1655",
  "version": "v1",
  "published": "2012-06-08T03:11:33.000Z",
  "updated": "2012-06-08T03:11:33.000Z",
  "title": "Effect of tilting on turbulent convection: Cylindrical samples with aspect ratio $Γ=0.50$",
  "authors": [
    "Stephan Weiss",
    "Guenter Ahlers"
  ],
  "comment": "19 pages, 12 figures",
  "categories": [
    "physics.flu-dyn"
  ],
  "abstract": "We report measurements of properties of turbulent thermal convection of a fluid with a Prandtl number $\\Pra=4.38$ in a cylindrical cell with an aspect ratio $\\Gamma=0.50$. The rotational symmetry was broken by a small tilt of the sample axis relative to gravity. Measurements of the heat transport (as expressed by the Nusselt number \\Nu), as well as of large-scale-circulation (LSC) properties by means of temperature measurements along the sidewall, are presented. In contradistinction to similar experiments using containers of aspect ratio $\\Gamma=1.00$ \\cite[]{ABN06} and $\\Gamma=0.50$ \\cite[]{CRCC04,SXX05,RGKS10}, we see a very small increase of the heat transport for tilt angles up to about 0.1 rad. Based on measurements of properties of the LSC we explain this increase by a stabilization of the single-roll state (SRS) of the LSC and a de-stabilization of the double-roll state (DRS) (it is known from previous work that the SRS has a slightly larger heat transport than the DRS). Further, we present quantitative measurements of the strength of the LSC, its orientation, and its torsional oscillation as a function of the tilt angle.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2012-06-08T03:11:33.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "aspect ratio",
      "turbulent convection",
      "cylindrical samples",
      "measurements",
      "tilt angle"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "doi": "10.1017/jfm.2012.520",
      "journal": "Journal of Fluid Mechanics",
      "year": 2013,
      "month": "Jan",
      "volume": 715,
      "pages": 314
    },
    "note": {
      "typesetting": "TeX",
      "pages": 19,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "adsabs": "2013JFM...715..314W"
    }
  }
}