Abstract
In the present study, numerical analysis of particle behavior in horizontal high shear mixer with super high speed chopper （SPM mixer） was conducted. The three-dimensional particle motion in SPM mixer was calculated using discrete elements method （DEM）. Torque of chopper blades, particle velocity, and forces acting on particles were calculated under various chopper rotational speeds. The particle flow changed with the chopper rotational speed. The torque of chopper blades and the forces acting on particles increased with an increase in rotational speed of the chopper. It became clear that the more rotational speed of chopper, the more torque of chopper and forces acting on particles increased at an accelerated rate.
The result of simulation was confirmed by experiment of dry dispersion of fine particle using SPM mixer. Ferric oxide was used as fine particle. It was found that dispersion time decreased at an accelerated rate with an increase in rotational speed of chopper.
