A DEM study of the mixing of particles induced by a flat blade

摘要: Abstract Powder mixers often deploy blades of various kinds to impart convective motion particles. Here, a single blade is followed through bed, an arrangement that has previously been effective for understanding mixing, investigate the effects rake angle and speed on blade-induced mixing behaviour particles by means Discrete Element Method. When ϕ varied from 45° 90° then 135° at fixed 0.2 m/s, Froude ( Fr ) number varies 0.144 0.10 back 0.144, respectively horizontal force found decrease monotonically with increasing if immersion depth held constant. This not affected in range 0.2–0.6 m/s (or 0.14–1.3) =135°. For =135°, particle dispersion be largest top bottom bed. Convective shown predictable velocity-field based particle-motion simulations. Dynamic similarity confirmed occur geometrically similar systems macroscopic quantities such as non-dimensional scaled average velocity. Further, single-blade model can used understand vertically shafted two-bladed cylindrical mixer. The results demonstrate potential utilising developed much complex industrial systems.