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Intermittency between avalanche regimes on grain piles
Physical review. E
We experimentally investigate discrete avalanches of grains, driven by a low inflow rate, on an erodible pile in a channel. We observe intermittency between one regime, in which avalanches are quasi-periodic and system-spanning, and another, in which they pass at irregular intervals and have a power-law size distribution. Observations are robust to changes of inflow rate and grain type, and require no tuning of external parameters. We demonstrate that the state of the pile's surface determinesdoi:10.1103/physreve.97.060901 pmid:30011504 fatcat:c2zlxutvhvhrdbe7qtzb5nesku