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Modulation and Subgrid Scale Modeling of Gas-Particle Turbulent Flow

  • T. Kajishima
  • S. Takiguchi
  • Y. Miyake
Part of the Fluid Mechanics and its Applications book series (FMIA, volume 54)

Abstract

Turbulence modulation in particle-laden fluid flow, especially the influence of vortex shedding, was investigated based on the direct numerical simulation. To this end, we developed a finite-difference scheme to resolve the flow around each particle moving in turbulence. Energy budget around a sphere suggested that the energy production due to vortex shedding was about 20% of work by the particle. Homogeneous turbulence including many particles showed a modulation in background turbulence; namely, energy transfer from larger to smaller scale through wavenumber region corresponding to the mean spacing of particles. Taking these findings into account, a one-equation model for subgrid scale turbulence was suggested for the large-eddy simulation of particle-laden turbulence.

Keywords

Direct Numerical Simulation Subgrid Scale Fluid Turbulence Homogeneous Turbulence Particle Reynolds Number 
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 Science+Business Media Dordrecht 1999

Authors and Affiliations

  • T. Kajishima
    • 1
  • S. Takiguchi
    • 1
  • Y. Miyake
    • 1
  1. 1.Department of Mechanical EngineeringOsaka UniversitySuita, OsakaJapan

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