Fracturing-induced fluidization of vibrated fine-powder column

We experimentally investigate the effect of vertical vibrations on brittle behavior fine cohesive powders consisting glass beads 5 μm in diameter. This is an attempt to understand a sole role fluidizing Geldart’s group C powders, which known for posing difficulty while fluidization. find that powder column can be compacted, fractured, and effectively fluidized by increasing strengths external vibrations. process vibration-induced fracturing summarized full experimental phase diagram showing four distinct phases vibrated column: consolidation (CS), static fracture (SF), dynamic (DF), convective (CF). boundary separating consolidated regimes depends dimensionless shaking strength, S. However, DF regime, decompaction wave propagation speed normalized gravitational found independent In order reach our ultimate goal effective fluidization we explore geometrical parameters like container shapes, sizes, base conditions. circular cylinder with hemispherical condition most achieve when vibrated.