J. Phys. II France
Volume 1, Numéro 10, October 1991
Page(s) 1147 - 1166
DOI: 10.1051/jp2:1991125
J. Phys. II France 1 (1991) 1147-1166

Behavior of powder under weak perturbations: the concept of the effective surface. I.

E. V. Gurovich and S. V. Maruk

Department of Theoretical Physics, Institute for High Pressure Physics, Moscow Region, Troisk, 142092, U.S.S.R.

(Received 13 May 1991, accepted in final form 17 June 1991)

On the base of the semiphenomenological model one-particle approach describing the behavior of powder under weak perturbation is developed. The notion of the effective surface which restricts the possible shift of a grain due to the presence of surrounding ones is put forward. The dynamics of swelling and packing down is considered as a synergetic self-organizing process through Poincare's maps. The equilibrium density for a given intensity of perturbations is described. The origin of the convective motion in vibration and its threshold character are investigated.

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