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Novel Hydrocyclones for Minimal Erosion

Novel Hydrocyclones for Minimal Erosion . Hydrocyclone : Fundamental and Application

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Novel Hydrocyclones for Minimal Erosion

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  1. Novel Hydrocyclones for Minimal Erosion Hydrocyclone: Fundamental and Application The hydrocyclone is a mechanical separation device which is used widely in mineral processing. The solid particles in mineral slurries are separated according to their density, size and shape by the centrifugal force generated by an induced vortex motion in a cylinder-on-cone vessel. The objective of this project is to use the computational fluid dynamic (CFD) technique to model the turbulent swirling flow and predict regions of significant wear and how they are influenced by design of the inlet ducting. Novel hydrocyclone designs are proposed form lower operating energy costs and minimal erosion. Mathematical Mdel A 3D mathematical model of the hydrocyclone is developed to study turbulent flow and track particle separation as well as predict wear distribution on the inner wall of hyrdocyclone. Different geometrical designs are tested to explore better performance, especially for minimal erosion Particle Tracking The Lagrangian DPM follows the Euler-Lagrange approach. The fluid phase is treated as a continuum by solving the time-averaged Navier-Stokes equations, while the dispersed phase is solved by tracking a large number of particles through the calculated flow field. Erosion Rate Obvious hot spots can be found at the intersection of the cylindrical and conical sections and the middle part of conical section in the standard hydrocyclone. Novel hydrocyclones with different geometry indicate better performance and reduced erosion. Peng XU, PhD, College of Science of China Jiliang University & Department of Mechanical Engineering in National University of Singapore. Email: xupenghust@yahoo.com.cn Arun S. Mujumdar, Professor and Director Centre, Department of Mechanical Engineering and Minerals, Metals and Material Technology Centre (M3TC), National University of Singapore Contact: mpeasm@nus.edu.sg Fluid Flow and Air Core Prediction The numerical results clearly indicates swirling flow pattern, and splitting overflow and underflow in hydrocyclone. The predicted axial and tangential velocities are close to experimental results. A nearly parabolic shape of the air core is well predicted, which agrees well with the experimental data.

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