{
  "id": "physics/0601105",
  "version": "v1",
  "published": "2006-01-16T07:41:40.000Z",
  "updated": "2006-01-16T07:41:40.000Z",
  "title": "Dynamo action at low magnetic Prandtl numbers: mean flow vs. fully turbulent motion",
  "authors": [
    "Yannick Ponty",
    "Pablo Mininni",
    "Jean-François Pinton",
    "Hélène Politano",
    "Annick Pouquet"
  ],
  "comment": "4 pages, 4 figures",
  "doi": "10.1088/1367-2630/9/8/296",
  "categories": [
    "physics.flu-dyn"
  ],
  "abstract": "We compute numerically the threshold for dynamo action in Taylor-Green swirling flows. Kinematic calculations, for which the flow field is fixed to its time averaged profile, are compared to dynamical runs for which both the Navier-Stokes and the induction equations are jointly solved. The kinematic instability is found to have two branches, for all explored Reynolds numbers. The dynamical dynamo threshold follows these branches: at low Reynolds number it lies within the low branch while at high kinetic Reynolds number it is close to the high branch.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2006-01-16T07:41:40.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "low magnetic prandtl numbers",
      "fully turbulent motion",
      "dynamo action",
      "mean flow",
      "high kinetic reynolds number"
    ],
    "tags": [
      "journal article"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 4,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}