CFD modeling of dense medium cyclone

A number of empirical models are in existence for the dense medium cyclone (DMC) and in recent years this subject has been broached with computational fluid dynamics (CFD). The dense medium presents a centrifugal field within the cyclone body. The coal particles separate in this field due to various forces acting on them. Hence, CFD is ideally suited for the modeling of the DMC. The Large Eddy Simulation (LES) method for resolving the turbulence was used in the CFD simulation of a 76mm dense medium cyclone. In particular, the magnetite was modeled as three granular fluids. In the simulation the diameter of the vortex finder and spigot are varied to compare with the experimental data of P. A. Verghese and T. C. Rao. The results obtained using LES turbulence model is found to be accurate in terms of the cut density and the slope of the distribution curves. Thus, the three granular fluid modeling of the magnetite stream is a computationally simpler method for the analysis of DMC.

Computational fluid dynamics; Dense medium hydrocyclone; Large Eddy Simulation; Reynolds stress model Centrifugal fields; CFD modeling; CFD simulations; Coal particles; Dense medium; Dense medium cyclone; Distribution curves; Empirical model; Experimental data; Granular fluids; Hydro-cyclone; Large Eddy simulation methods; Reynolds stress models; Atmospheric boundary layer; Centrifugation; Coal industry; Coal preparation; Computer simulation; Cyclone separators; Fluid dynamics; Fluids; Large eddy simulation; Magnetite; Oxide minerals; Reynolds number; Storms; Turbulence models; Computational fluid dynamics

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