Fluid-Flow Model of the Hydrocyclone for Concentrated Slurry Classification

An investigation of the effect of the particle–fluid and particle–particle interactions on the flow within a hydrocyclone

“…In this study, an application of a time scale analysis to identify the predominant interaction is presented for the 75 mm hydrocyclone, based on the experiment and prediction of Rajamani and Milin [17]. The time scales are calculated for seven flow zones within a hydrocyclone, instead of six flow zones, which was carried out in the author's previous work, Fig.…”

“…The lower part of the hydrocyclone from the middle to the end of the conical section outside the boundary layer on the lateral walls and the boundary layer near the air core Table 6 The experimental selectivity values [17] Particle size (m) Percent of solid recovery to underflow 90 100 65 92 45 80 33 52 23 30 16 20 11 16 8 1 1 4 1 0 3 9 1 7 Kraipech [11]. The locations of each zone are described and shown in Table 5 and Fig.…”

“…4. Predicted volumetric concentration map for 35% limestone by weight (16.6% by volume) in the feed [17]. The middle part of the hydrocyclone from the bottom of the vortex finder tube to the middle of the conical section outside the boundary layer on the lateral walls and the boundary layer near the air core III…”

“…The particle-fluid and particle-particle interactions are analysed using the concept of a time scale analysis introduced by Roco [20]. Here a case study is presented, based on the results published by Rajamani and Milin [17] for a 75 mm hydrocyclone. On this basis, the zones of the predominant interaction mechanism can be defined and in turn, a proper choice of a specific approach for modelling the flow within hydrocyclone can be made.…”

Hydrodynamic Modeling of Swirling Flow and Particle Classification in Large-Scale Hydrocyclones

“…Anyhow, the second and more rigorous method is to start with the water phase only, solve for particle concentrations, and iterate between the Navier-Stokes solution and the particle concentration calculations. A logical way of calculating the concentration is to determine the residence time of particles in a control volume and proportion the feed concentration to the nodal point with respect to its residence time among all the particles in the inlet (Rajamani and Milin, 1992).…”