Abstract:
The main work of this paper is to conduct a numerical study of gas-liquid-solid flow in a 75mm hydrocyclone. In the numerical study, the interface between air core and liquid and the solidliquid mixture are simulated by the mixture multiphase flow model. Considering that the engineering medium is mostly non-Newtonian fluid and the drilling fluid can be represented by power-law model, the viscosity model adopts power-law model. The validation of the numerical model is mainly to investigate the influence of the change of feed solids concentration on the inlet pressure drop, the fractional efficiency curve, the separation particle size and the water distribution of the hydrocyclone. The results showed that with the increase of solid concentration, the separation efficiency of the same particle size decreased, the separation particle size increased and the pressure drop increased. At the same time, it is observed that the distribution and variation of tangential velocity, axial velocity, inlet pressure drop and turbulent viscosity are consistent.
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