Onset of fluidization in vertically shaken granular material

Details Onset of fluidization in vertically shaken granular material Onset of fluidization in vertically shaken granular material

1997-11-22

arxiv.org/abs/cond-mat/9711234v2

Phys. Rev. E, Vol. 62, 1361 (2000)

Physics

Condensed Matter

Statistical Mechanics

7 pages, 5 figures

Scientific paper

10.1103/PhysRevE.62.1361

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 $\omega_0$.

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