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Title: Anomalous diffusion in a running sandpile model

Anomalous diffusion in a running sandpile model To explore the character of underlying transport in a sandpile, we have followed the motion of tracer particles. Moments of the distribution function of the particle positions, {l_angle}{vert_bar}x(t){minus}x(0){vert_bar}{sup n}{r_angle}=D{sub 0}t{sup n{nu}(n)}, are determined as a function of the elapsed time. The numerical results show that the transport mechanism for distances less than the sandpile length is superdiffusive with an exponent {nu}(n) close to 0.75, for n{lt}1. {copyright} {ital 1999} {ital The American Physical Society}
Authors: ; ; ; ;
Publication Date:
OSTI Identifier:686878
Resource Type:Journal Article
Data Type:
Resource Relation:Journal Name: Physical Review. E, Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics; Journal Volume: 60; Journal Issue: 4; Other Information: PBD: Oct 1999
Country of Publication:United States
Language:English
Subject: 66 PHYSICS; SAND; DIFFUSION; TRANSPORT THEORY; DISTRIBUTION FUNCTIONS; SCALING LAWS; PLASMA SIMULATION; TURBULENCE; NUMERICAL SOLUTION