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Particle Dispersion in Large-Eddy Simulations: Influence of Reynolds Number and of Subgrid Velocity Deconvolution

  • Maria Vittoria Salvetti
  • Cristian Marchioli
  • Alfredo Soldati
Part of the Notes on Numerical Fluid Mechanics and Multidisciplinary Design book series (NNFM, volume 110)

Abstract

Particle dispersion in turbulent channel flow is investigated through Lagrangian tracking of inertial pointwise particles one-way coupled to the fluid. First, the results obtained in direct numerical simulations at two different shear Reynolds numbers, \(Re^l_{\tau}\) = 150 and \(Re^h_{\tau}\) = 300, for particles having different inertia are briefly summarized and the Reynolds number effects are discussed. Then, particle dispersion in LES flow fields at \(Re^h_{\tau}\) is compared to reference DNS data. Comparison is made with and without approximate deconvolution of the LES fluid velocity field in the particle motion equations. It is found that particle segregation and, consequently, near wall accumulation are underestimated in LES, although approximate deconvolution improves the agreement with DNS. These findings confirm those of analogous previous studies at \(Re^l_{\tau}\).

Keywords

Direct Numerical Simulation Particle Dispersion Direct Numerical Simulation Data Wall Accumulation Reynolds Number Effect 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2010

Authors and Affiliations

  • Maria Vittoria Salvetti
    • 1
  • Cristian Marchioli
    • 2
  • Alfredo Soldati
    • 2
  1. 1.Dip. Ingegneria AerospazialeUniversità di PisaPisa(Italy)
  2. 2.Centro Interdipartimentale Fluidodinamica e Idraulica and Dip. Energetica e MacchineUniversità di UdineUdine(Italy)

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