Abstract: In this paper, based on the development of rotary disc mixers，the dynamic mixing of particles was studied by analyzing the distribution of velocity and the shear rate with the software of Polyflow. Moreover, the distribution and dispersion in a rotary disc mixer were analyzed based on the distribution of residence time and maximum shear stress. The results show that the rotary disc mixer can exert strong shearing and compression as well as displacement actions. Meanwhile, dispersion mixing performance is promoted and axial distribution mixing is decreased with the increasing rotating speed of the rotary disc.

Key words: rotary disc mixer, residence time, maximum shear stress, mixing performance