Translated Papers
Numerical modeling of convective motion in granular materials

https://doi.org/10.1163/156855294X00375Get rights and content

Abstract

Numerical modeling of convection of powder was performed. Convection of powder occurs when a strong vertical vibration is applied. When the control parameter, the acceleration amplitude Γ, exceeds some critical value Γc, convection and heaping start. In our simulation, the powder is modeled with a discrete elementary method but without rotation and with isotropic linear visco-elastic interaction. The convection is reproduced and Γc turns out to be about the gravity acceleration g, which agrees with experimental findings. Another remarkable phenomena, surface fluidization, is also reproduced and the critical value Γc again agrees with experimental findings. It is suggested that this convection is caused by the instability of powder induced by the elastic interaction.

References (17)

  • H.M. Jaeger et al.

    Physics of the granular state

    Science

    (1992)
  • G.H. Ristow

    Simulating granular flow with molecular-dynamics

    J. Phys. I (France)

    (1992)
  • J.A.C. Gallas et al.

    2-Dimensional powder transport on a vibrating belt

    J. Phys. II (France)

    (1992)
  • T.A.J. Duke et al.

    A Monte-Carlo study of granular relaxation

    Europhys. Lett.

    (1990)
  • A. Mehta et al.

    Vibrated powders: a microscopic approach

    Phys. Rev. Lett.

    (1991)
  • S.-i. Sasa et al.

    Void-fraction dynamics in fluidization

    Europhys. Lett.

    (1992)
  • H.M. Jaeger et al.

    Friction in granular flows

    Europhys. Lett.

    (1990)
  • O. Zik et al.

    Self-diffusion in granular flows

    Europhys. Lett.

    (1991)
There are more references available in the full text version of this article.
View full text