Granular particles with diameters 3mm, 6mm and 0.6mm, of the same density 0.9g/cm3 and the same total weight 100g in vertically vibrating systems were studied. The transition processes of granular systems from Reversed Brazilian Nut (RBN) Effect to Brazilian Nut (BN) Effect at varied conditions, including different vibrating frequencies, amplitudes, and particles sizes, together with computer simulations were investigated. We have observed experimentally that BN Effect or RBN Effect was appeared at certain particle parameters and vibrating conditions, and discussed in five aspects: dynamic equilibrium, separation mode, convection modes, mass distribution and resonance frequency. The results indicate that the upsurge of granular convection and resonance behavior during the processes plays an important role in phase transitions.

This content is only available via PDF.
You do not currently have access to this content.