Onset of fluidization in vertically shaken granular material

Abstract

When granular material is shaken vertically one observes convection, surface fluidization, spontaneous heap formation and other effects. There is a controversial discussion in literature whether there exists a threshold for the Froude number $\Gamma =A_0{\omega }_0^2/g$ below which these effects cannot be observed anymore. By means of theoretical analysis and computer simulation we find that there is no such single threshold. Instead we propose a modified criterion which coincides with critical Froude number ${\Gamma }_c=1$ for small driving frequency ${\omega }_0$.

7 pages, 5 figures

References in corpus (2)

• A model for collisions in granular gases
• Size segregation and convection

Cited by in corpus (5)

• Wet Granular Materials
• Extremal collision sequences of particles on a line: optimal transmission of kinetic energy
• Studies of Mass and Size Effects in Three-Dimensional Vibrofluidized Granular Mixtures
• Pattern-transition, microstructure and dynamics in two-dimensional vibrofluidized granular bed
• Asymmetric and Long Range Interactions in Shaken Granular Media