Tracer particle transport dynamics in the diffusive sandpile cellular automaton
- Universidad de Cantabria, Santander (Spain). Departamento de Física Aplicada; Universidad de Cantabria, Santander (Spain)
- Universidad Carlos III de Madrid (Spain). Departamento de Física
- 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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