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Spontaneous Stratification in Granular Mixtures
Hernan A. Makse, Shlomo Havlin, Peter R. King +1
Granular materials size segregate when exposed to external periodic perturbations such as vibrations. Moreover, mixtures of grains of different sizes spontaneously segregate in the…
Mechanisms of Granular Spontaneous Stratification and Segregation in Two-Dimensional Silos
Pierre Cizeau, Hernan A. Makse, H. Eugene Stanley
Spontaneous stratification of granular mixtures has been reported by Makse et al. [Nature 386, 379 (1997)] when a mixture of grains differing in size and shape is poured in a quasi…
Dynamics of Granular Stratification
Hernan A. Makse, Robin C. Ball, H. Eugene Stanley +1
Spontaneous stratification in granular mixtures has been recently reported by H. A. Makse et al. [Nature 386, 379 (1997)]. Here we study experimentally the dynamical processes lead…
Microscopic Model for Granular Stratification and Segregation
Hernan A. Makse, Hans J. Herrmann
We study segregation and stratification of mixtures of grains differing in size, shape and material properties poured in two-dimensional silos using a microscopic lattice model for…
Stratification Instability in Granular Flows
Hernan A. Makse
When a mixture of two kinds of grains differing in size and shape is poured in a vertical two-dimensional cell, the mixture spontaneously stratifies in alternating layers of small…
Surface Flows of Granular Mixtures: III. Canonical Model
Thomas Boutreux, Hernan A. Makse, Pierre-Gilles de Gennes
We present the generalization of the minimal model for surface flows of granular mixtures, proposed by Boutreux and de Gennes [J. Phys. I France 6, 1295 (1996)]. The minimal model…