A non-standard statistical approach to the silo discharge |
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Authors: | R Arévalo A Garcimartín D Maza |
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Institution: | (1) Department of Physics and Applied Mathematics, Universidad de Navarra, 31080 Pamplona, Spain;(2) Also at Physics Institute, Universidad de Navarra, 31080 Pamplona, Spain |
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Abstract: | We present molecular dynamics simulations of the beginning of a
silo discharge by gravity. The evolution of the velocity profile
and the probability density functions for the displacements of the
grains are obtained. These PDFs reveal non-gaussian statistics and
superdiffusive behavior similar to that observed in some
experiments. We propose an analytical expression for the PDFs and
an explanation for its dynamical origin in connection with the
ideas of the “spot" model and non-extensive thermodynamics. |
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Keywords: | |
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