(58w) Modeling Hydrocyclones Using Two Fluid Model (Eulerian-Eulerian) Approach
- Conference: AIChE Spring Meeting and Global Congress on Process Safety
- Year: 2018
- Proceeding: 2018 Spring Meeting and 14th Global Congress on Process Safety
- Group: Spring Meeting Poster Session and Networking Reception
- Time: Monday, April 23, 2018 - 5:00pm-7:00pm
Numerical simulation is a powerful tool to understand the flow behavior, calculate the pressure drop, particle trajectories and collection efficiency of hydrocyclones. Also it can reduce the experimental costs required for testing and optimization. While extensive work has been done on performance, scale-up, and simulation of hydrocyclones the effect of used approach in the results is not yet clear and there are discrepancies between models according to mesh type, turbulence model and seeding rate.
In this work, the Two Fluid Model (TFM) approach will be compared with Lagrangian Particle Tracking (LPT) approach. In case of low feeding solids, the CFD-LPT approach results are accurate and computationally efficient. However, as the effect of inter-particle interactions as well as the reaction of particles on the fluid are ignored its application is limited. On the other hand, in TFM both the fluid and solid phases are treated as interpenetrating continuum media and therefore it can handle feeding solids at different concentrations. We used Reynolds Stress Model and compared various cases to show the advantages of TFM approach. In addition, we showed that an increase in the inlet pressure will increase the static pressure differential along the radius within the cyclone body hence more water split into overflow. At the end, we discuss the effect of particle density on efficiency of cyclone.