Large-eddy simulations of the flow around surface mounted obstacles (Abstract/Comunicazione in atti di convegno)

Type
Label
  • Large-eddy simulations of the flow around surface mounted obstacles (Abstract/Comunicazione in atti di convegno) (literal)
Anno
  • 2002-01-01T00:00:00+01:00 (literal)
Alternative label
  • Broglia, Riccardo Balaras, Elias (2002)
    Large-eddy simulations of the flow around surface mounted obstacles
    in 55th Annual Meeting of American Physical Society, Dallas, Texas, USA, November 24th -26th 2002
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Broglia, Riccardo Balaras, Elias (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#url
  • http://flux.aps.org/meetings/YR02/DFD02/baps/abs/S1730001.html (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#titoloVolume
  • Bulletin of the American Physical Society, 55th Annual Meeting of the Division of Fluid Dynamics (literal)
Note
  • Comunicazione (literal)
  • PuM (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • CNR-INSEAN, Roma - Istituto Nazionale per Studi ed Esperienze di Architettura Navale Department of Mechanical Engineering, University of Maryland, College Park, USA (literal)
Titolo
  • Large-eddy simulations of the flow around surface mounted obstacles (literal)
Abstract
  • In the present study large-eddy simulations (LES) are employed to study turbulent boundary layers with two- and three-dimensional obstacles on the wall. The presence of the obstacle(s), which is a small portion of the boundary layer thickness, increases substantially the required number of grid nodes in all coordinate directions and therefore the cost. To overcome this problem a parallel multi-domain LES methodology on Cartesian grids has been developed. The equations governing the evolution of the large-scales are solved using a second-order projection method. Spatial derivatives are approximated with second-order central differences on a staggered grid. The large-band matrix associated to the Poisson equation is solved using Krylov subspace iterative solvers. The ratio between the obstacle height and the boundary layer thickness is approximately 7, and the Reynolds number based on the obstacle hight and freestream velocity is of the order 1500. This configuration resembles the conditions in the experiments reported by Vin¸ont et al. (J. Fluid Mech., 424:127-167). Detailed comparisons between the LES and the above experiments for the velocity statistics at various downstream locations will be reported. (literal)
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