Hydrocyclone separation technique recently has been used in an increasing number of
applications. Reynolds Stress Turbulence Model (RSM) and Discrete Phase Model (DPM) were
employed in Computational Fluid Dynamics (CFD) 3D simulation to draw the motion trace of single
particle of different particle size and density in hydrocyclone separator. It is known that, smaller size
particles flow out from overflow, larger size particles flow out from underflow, and there is a
characteristic size of particles having longer residence time in hydrocyclone separator. Particle size
influences separation efficiency more significantly than particle density. Simulation of particle cluster
separation efficiency in hydrocyclone separator has some d