In order to analyze the heat and mass transfer characteristics of cut tobacco
in a horizontal drum dryer, the discrete element method (DEM) was used to
calculate the particle collision model and DEM-CFD coupled heat transfer
model. With the increase of the rotating speed, the mixing degree gradually
increases, and when the rotating speed is 16 rpm, the mixing degree is
higher. When the heat flux of EDEM-CFD coupling is 0.2 W-1W, the particle
temperature will gradually increase and tend to a fixed value. The residence
time of the material has a great influence on the drying quality of the
material particles. If the residence time is too short, the heat of the
material will be uneven, and if the residence time of the material is too
long, the damage of the material particles will increase, increased crushing
rate.