A Dynamic Eddy Viscosity Model Deduced from Local Inter-Scale Equilibrium Approximation of Energy Transfer

DOI

Bibliographic Information

Other Title
  • エネルギー伝達の局所スケール間平衡近似から導出されたダイナミック渦粘性モデル

Description

In this paper, we propose a new dynamic procedure for the subgrid scale (SGS) model of eddy viscosity type used in the large-eddy simulation. The main role of the SGS model of eddy viscosity type is to mimic the energy dissipation from the grid-filter resolved scale. So the dynamic procedure for the eddy viscosity model is expected to have some relation to the theory about the energy dissipation. But the standard dynamic procedure, proposed by Lilly, is not the model of this kind. So we construct a new dynamic procedure using the local inter-scale equilibrium approximation of energy transfer in the wave number space. The eddy viscosity coefficient can be calculated automatically using this approximation without the averaging operation in homogeneous direction. The validity of the proposed dynamic procedure is shown in the analysis of the plane channel flow.

Journal

Details 詳細情報について

  • CRID
    1390282680565636864
  • NII Article ID
    130005020003
  • DOI
    10.11345/japannctam.52.0.430.0
  • Data Source
    • JaLC
    • CiNii Articles
  • Abstract License Flag
    Disallowed

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