Tracking study on solids motion in vertically vibrated granular beds

Abstract

The dynamics of granular motion have been studied in a vertically vibrated bed using Positron Emission Particle Tracking (PEPT), which allows the motion of a single tracer particle to be followed in a non-invasive way. Features of the solids motion such as cycle frequency and dispersion index were investigated. The particle circulation frequency was found to increase linearly with increase in the vibration amplitude. Particle dispersion also increased strongly with vibration amplitude. Horizontal dispersion is stronger than vertical dispersion at larger vibration amplitudes.