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Influence of the turbulence structure on the particle sedimentation in wall-bounded flows

  • M. Cargnelutti
  • L. M. Portela
Part of the ERCOFTAC Series book series (ERCO, volume 11)

Abstract

In this paper we analyze the influence of the particle Froude number in the settling velocity of particles in wall-bounded turbulence. We consider dilute situations using point-particle direct numerical simulations, neglecting the modifications of the flow by the particles (one-way coupling). We compare our results with the cases of particles settling around a single vortex and a vortex array. The behavior of the settling velocity in the wall-bounded turbulence case is found to be similar to the one of particles settling in a vortex array with a “large” inter-vortex distance. We analyze how the particle settling velocity is related to the particle-fluid two-point velocity correlations.

Keywords

Particle Sedimentation Settling Velocity Turbulence Structure Vortex Center Single Vortex 
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 2007

Authors and Affiliations

  • M. Cargnelutti
    • 1
  • L. M. Portela
    • 1
  1. 1.Delft University of Technology, MSPDelftThe Netherlands

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