Numerical Simulation Study on the Internal Flow Field of Hydrocyclone

The processing software GAMBIT modeling、setting up meshes and defining boundaries,the internal flow field was simulated with computational fluid dynamics(CFD) software FLUENT.The multiphase mixture and reynolds stress model were chosen to simulate the present flows,the second order upwind difference method is utilized to perform a discrete solution for momentum equation and the velocity-pressure is solved coupling with SIMPLE(semi-implicit method for pressure-linked equations).Information of radical,axial tangential velocity,the velocity vector streamline diagram and pressure field were presented through numerical calculation.The results show that the static pressure is relative small nearby the medial axis,dynamic pressure gradient is relative big;tangential velocity increases at first then decreases from inside to outside,and the consistency of tangential velocity direction indicates that the consistency of internal and external rotation direction;zero velocity envelope surface exists due to axial velocity,providing theoretical evidence for optimization and design of hydrocyclone.