NEW TRENDS IN LARGE-EDDY SIMULATIONS OF TURBULENCE

The paper presents large-eddy simulation (LES) formalism, along with the various subgrid-scale models developed since Smagorinsky's model. It is shown how Kraichnan's spectral eddy viscosity may be implemented in physical space, yielding the structure-function model. Recent developments of this model that allow the eddy viscosity to be inhibited in transitional regions are discussed. A dynamic procedure is presented, where a double filtering allows the dynamic determination of the subgrid-scale model constants. The importance of backscatter effects is discussed. Alternatives to the eddy-viscosity assumption, such as scale-similarity models, are considered. Pseudo-direct simulations in which numerical diffusion replaces subgrid transfers are mentioned. Various applications of LES to incompressible and compressible turbulent flows are given, with an emphasis on the generation of coherent vortices.

  • Supplemental Notes:
    • Annual Rev Fluid Mechanics, 1996, p 45 [38 p, 109 ref, 11 fig]
  • Authors:
    • Lesieur, M
    • Metais, O
  • Publication Date: 1996

Language

  • English

Subject/Index Terms

Filing Info

  • Accession Number: 00728041
  • Record Type: Publication
  • Source Agency: British Maritime Technology
  • Files: TRIS
  • Created Date: Nov 4 1996 12:00AM