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Tracer particle transport dynamics in the diffusive sandpile cellular automaton

Journal Article · · Chaos, Solitons and Fractals
 [1];  [2];  [3]
  1. Universidad de Cantabria, Santander (Spain). Departamento de Física Aplicada; Universidad de Cantabria, Santander (Spain)
  2. Universidad Carlos III de Madrid (Spain). Departamento de Física
  3. Univ. of Alaska, Fairbanks, AK (United States). Dept. of Physics

The confinement properties of the diffusive running sandpile are characterized by tracking the motion of a population of marked grains of sand. It is found that, as the relative strength of the avalanching to the diffusive transport channel is varied, a point is reached at which the particle global confinement time and the probability density functions of the jump-sizes and waiting-times of the tracked grains experience a sudden change, thus revealing a dynamical transition, that is consistent with previous studies (Newman DE et al., Phys Rev Lett 2002;88(20):204304). Across this transition, the sandpile moves from a regime characterized by self-similarity and memory, where avalanches of all possible sizes dominate transport across the system, to another regime where transport is taken over by near system-size, quasi-periodic avalanches. Values for the fractional transport exponents that quantify effective transport across the sandpile prior to the transition are also obtained.

Research Organization:
Univ. of Alaska, Fairbanks, AK (United States)
Sponsoring Organization:
USDOE Office of Science (SC)
Grant/Contract Number:
FG02-04ER54741
OSTI ID:
1849554
Alternate ID(s):
OSTI ID: 1778498
Journal Information:
Chaos, Solitons and Fractals, Journal Name: Chaos, Solitons and Fractals Journal Issue: C Vol. 140; ISSN 0960-0779
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English

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