Hydrodynamic Modeling of Turbulence Modulation by Particles in a Swirling Gas–Particle Two-Phase Flow

Turbulence modulations by particles of a swirling gas–particle two-phase flow in an axisymmetric chamber are numerically simulated. To fully consider the preferential concentrations and anisotropic dispersions particles, second-order moment model coupling particle–particle collision was improved. Experimental validation for proposed model, algorithm, in-house codes acceptable match carried out. The effects ultralight-expanded graphite heavy copper with large span Stokes number on gas velocities fluctuations, Reynolds shear stresses tensor invariants, turbulence kinetic energies, vortice structures investigated. results show that turbulent modulation exhibits strong characteristics remains close relationship structure. Modulation disturbances vortex evolution enforced heavy-large higher numbers. Preferential accumulations ultralight stress regions at lower vortices weaker than those particles. For axial modulations, particle plays primary role inhibition action because larger inertia, light contributes to enhancement effect due excellent followability. instantaneous information coherent structure failed be acquired limitation time-averaged algorithm.