Recent Advances in DNS and LES pp 235-244 | Cite as

# Modulation and Subgrid Scale Modeling of Gas-Particle Turbulent Flow

## 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## Preview

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