{
  "id": "physics/0607255",
  "version": "v3",
  "published": "2006-07-27T14:45:26.000Z",
  "updated": "2008-01-26T14:15:08.000Z",
  "title": "Quantifying microbubble clustering in turbulent flow from single-point measurements",
  "authors": [
    "Enrico Calzavarini",
    "Thomas H. van den Berg",
    "Federico Toschi",
    "Detlef Lohse"
  ],
  "comment": "7 pages, 4 figures",
  "journal": "Phys. Fluids 20, 040702 (2008)",
  "doi": "10.1063/1.2911036",
  "categories": [
    "physics.flu-dyn",
    "nlin.CD"
  ],
  "abstract": "Single-point hot-wire measurements in the bulk of a turbulent channel have been performed in order to detect and quantify the phenomenon of preferential bubble accumulation. We show that statistical analysis of the bubble-probe colliding-times series can give a robust method for investigation of clustering in the bulk regions of a turbulent flow where, due to the opacity of the flow, no imaging technique can be employed. We demonstrate that micro-bubbles (radius R_0 ~ 0.1 mm) in a developed turbulent flow, where the Kolmogorov length-scale is, eta ~ R_0, display preferential concentration in small scale structures with a typical statistical signature ranging from the dissipative range, O(eta), up to the low inertial range, O(100 eta). A comparison with Eulerian-Lagrangian numeri- cal simulations is also presented to further support our proposed way to characterize clustering from temporal time series at a fixed position.",
  "revisions": [
    {
      "version": "v3",
      "updated": "2008-01-26T14:15:08.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "turbulent flow",
      "single-point measurements",
      "quantifying microbubble clustering",
      "bubble-probe colliding-times series",
      "temporal time series"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "publisher": "AIP",
      "journal": "Phys. Fluids"
    },
    "note": {
      "typesetting": "TeX",
      "pages": 7,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}