Particle Compaction Modeling

Particle mixing and compaction is a very important industrial and physical process used in theproduction of numerous materials, including food, pharmaceutics, and ceramics for structural and energy applications. Key aspects of this unit operation include the complexity of particle-particle interactions, which arise from the adhesion/cohesion characteristics of interfaces and morphological characteristics such as particle size, shape, and polydispersity. Here, discrete element method strategies have been explored as a stepping stone to investigate the effect of powder cohesion on the packing fraction as a function of compaction rate. Relationships between the random loose packing fraction and cohesive forces have been established as a function of ratio of cohesive force to particle weight. Thus, increasing this force ratio above a critical value has negligible impact on the packing fraction. Such result directly impacts the Hausner ratio flowability measurement, which is directly related to the packing fraction.