{
  "id": "1706.03219",
  "version": "v1",
  "published": "2017-06-10T10:54:42.000Z",
  "updated": "2017-06-10T10:54:42.000Z",
  "title": "Effect of filter type on the statistics of energy transfer between resolved and subfilter scales from a-priori analysis of direct numerical simulations of isotropic turbulence",
  "authors": [
    "M. Buzzicotti",
    "M. Linkmann",
    "H. Aluie",
    "L. Biferale",
    "J. Brasseur",
    "C. Meneveau"
  ],
  "categories": [
    "physics.flu-dyn"
  ],
  "abstract": "The effects of different filtering strategies on the statistical properties of the resolved-to-sub-filter scale (SFS) energy transfer are analyzed in forced homogeneous and isotropic turbulence. We carry out a priori analyses of statistical characteristics of SFS energy transfer by filtering data obtained from direct numerical simulations (DNS) with up to $2048^3$ grid points as a function of the filter cutoff scale. In order to quantify the dependence of extreme events and anomalous scaling on the filter, we compare a sharp Fourier Galerkin projector, a Gaussian filter and a novel class of Galerkin projectors with non-sharp spectral filter profiles. Of interest is the importance of Galilean invariance and we confirm that local SFS energy transfer displays intermittency scaling in both skewness and flatness as a function of the cutoff scale. Furthermore, we quantify the robustness of scaling as a function of the filtering type.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2017-06-10T10:54:42.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "direct numerical simulations",
      "isotropic turbulence",
      "a-priori analysis",
      "subfilter scales",
      "filter type"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 0,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}