{
  "id": "1302.5283",
  "version": "v5",
  "published": "2013-02-21T13:57:51.000Z",
  "updated": "2014-10-03T09:02:48.000Z",
  "title": "A Laboratory-Scale Experiment and a Numerical Simulation of Unusual Spiral Plumes in a High-Prandtl-number Fluid",
  "authors": [
    "A. N. Sharifulin",
    "V. A. Bezprozvannikh",
    "A. N. Poludnitsin"
  ],
  "comment": "9 pages, 4 figures, 9 references partially presented on DFD APS2012 in San Diego CA and on DFD APS2013 in Pittsburg,PA",
  "categories": [
    "physics.flu-dyn",
    "physics.geo-ph"
  ],
  "abstract": "We experimentally and numerically investigated the generation of plumes from a local heat source (LHS) and studied the interaction of these plumes with cellular convective motion (CCM) in a rectangular cavity filled with silicon oil at a Prandtl number (Pr) of approximately two thousand. The LHS is generated using a 0.2-W green laser beam. A roll-type CCM is generated by vertically heating one side of the cavity. The CCM may lead to the formation of an unusual spiral convective plume that resembles a vertical Archimedes spiral. A similar plume is obtained in a direct numerical simulation. We discuss the physical mechanism for the formation of a spiral plume and the application of the results to mantle convection problems. We also estimate the Reynolds (Re) and Rayleigh (Ra) numbers and apply self-similarity theory to convection in the Earth's mantle. Spiral plumes can be used to interpret mantle tomography results over the last decade.",
  "revisions": [
    {
      "version": "v4",
      "updated": "2014-05-28T15:33:17.000Z",
      "title": "Laboratory-Scale and Numerical Simulation of Strange Spiral Plumes in Fluid with High Prandtl Number",
      "abstract": "We experimentally and numericaly investigated the appearance of a plumes from local heat source(LHS) and studied their interaction with cellular convective motion(CCM) in rectangular cavity filled by silicon oil with Prandtl number about two thousand. LHS has been generated by beam of 0.2 W green laser. Roll-type CCM is caused by heating a vertical side of cavity. It is shown that the CCM may lead to the formation of a strange spiral convective plume looked like Archimedes spiral placed on vertical plane. Physical mechanism of the formation of spiral plume and application of obtained results for mantle convection problems are discussed. Application to convection in the Earth's mantle based on estimations of the Reynolds and Rayleigh numbers and theory of self-similarity. It is shown that possible existence of spiral plumes can help to interpreted last decade mantle tomography results.",
      "comment": "7 pages, 5 figures, 9 references partially presented on DFD APS2012 in San Diego CA and on DFD APS2013 in Pittsburg,PA",
      "journal": null,
      "doi": null
    },
    {
      "version": "v5",
      "updated": "2014-10-03T09:02:48.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "high prandtl number",
      "strange spiral plumes",
      "numerical simulation",
      "spiral convective plume",
      "decade mantle tomography results"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 9,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "adsabs": "2013arXiv1302.5283S"
    }
  }
}