CFD analysis on the characteristics of blades' torque of the twin-blade planetary mixer

Blades are the important devices for the twin-blade planetary mixer, which determine the mixing efficiency and the energy consumption. In this paper, CFD simulation was carried out to analyze the effects of technological parameters ( rotating speed, rotating mode) and geometric parameter (blade-blade gap) on the instantaneous and average torque of the hollow blade for the twin-blade planetary mixer. The results revealed that the instantaneous torque of blades is dependent on the relative position of the plain and hollow blades, where the rotating speed only affects the magnitude of the instantaneous torque. The average torque of blades shows a linear relation with the rotating speed.When the mixing material is Newtonian fluid,the rotating mode (co-rotating mode ,counter-rotating mode) has little effect on the magnitude of the average torque.