DEM Simulation And Analysis Of Binary Particle Mixing In Rollers

The mixing and agitation process of binary particulate materials in horizontal drums is widely used in industrial production activities.Compared to the actual and expensive experimental conditions,Discrete element method(DEM),an efficient numerical method for simulating particle flow,can be applied to the simulations of different particle properties and equipment operating conditions.It has been favored by a large number of scholars and experts.Based on the previous studies,this paper uses the quasi-2D discrete element method to study the influence of the angle,length and number of horizontal plate on mixing effect of binary particles.According to particle distribution,particle flow process,particle velocity distribution,and the law of contact change between heterogeneous particles,the optimum parameters of the plate are given.It deepens the understanding of the particle flow mixing mechanism in the corresponding equipment,and it also provides theoretical guidance and experimental support for the actual production process.The research shows that the introduction of horizontal drum internal plate can promote the radial throwing of particles.When we choose the angle of 60°,the average velocity of small particles is greater than that of large particles,and the mixing speed is faster in the initial period,and the mixing effect is superior.An optimized length of 0.6R can improve the amount of material in the granular system and the particle slip surface,and the contact between the particles is more frequent,and the mixing effect is better;The radius of drum has less interference with the mixing characteristics of the non-equal diameter particles under the condition of fixed filling level.The mixing effect of the binary particles in the drum is improved as the number of sheets copied increases.When we choose the number of 4,periodic shear action of the plate is frequent and the mixing effect of particles is better.