Gas-droplets turbulent flow and dispersion of particles downstream of a sudden pipe expansion using Euler/Euler model has been investigated for the case of low fraction of the droplet mass (ML1 = 0-0.1). The effect of a dispersed phase on the dispersion of particles and gas turbulence has been studied. The presence of fine dispersed droplets in the flow drastically attenuates the gas phase turbulence. Low-inertia droplets are well entrained into the circulation flow and present over the whole pipe section. Large particles go through the shear layer, practically not getting into the detached area. Comparison with experimental data on separated two-phase flows behind the plane backward-facing step is done.
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