Using the discrete element method to assess the mixing of polydisperse solid particles in a rotary drum

- Mixing of polydisperse particles in a rotary drum was evaluated using DEM method.
- Effects of drum rotational speed, particle size, and initial loading method were investigated.
- Good mixing could not be achieved for polydisperse particles as for monodisperse particles.
- Best mixing quality for polydisperse particles was achieved for the top-bottom initial loading.
- Addition of particles with sizes in between of the small and large particles reduced segregation.