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- W2795302334 abstract "We numerically examine ballistic active disks driven through a random obstacle array. Formation of a pinned or clogged state occurs at much lower obstacle densities for the active disks than for passive disks. As a function of obstacle density, we identify several distinct phases including a depinned fluctuating cluster state, a pinned single-cluster or jammed state, a pinned multicluster state, a pinned gel state, and a pinned disordered state. At lower active disk densities, a drifting uniform liquid forms in the absence of obstacles, but when even a small number of obstacles are introduced, the disks organize into a pinned phase-separated cluster state in which clusters nucleate around the obstacles, similar to a wetting phenomenon. We examine how the depinning threshold changes as a function of disk or obstacle density and find a crossover from a collectively pinned cluster state to a disordered plastic depinning transition as a function of increasing obstacle density. We compare this to the behavior of nonballistic active particles and show that as we vary the activity from completely passive to completely ballistic, a clogged phase-separated state appears in both the active and passive limits, while for intermediate activity, a readily flowing liquid state appears and there is an optimal activity level that maximizes the flux through the sample." @default.
- W2795302334 created "2018-04-06" @default.
- W2795302334 creator A5010373913 @default.
- W2795302334 date "2018-05-21" @default.
- W2795302334 modified "2023-10-11" @default.
- W2795302334 title "Clogging and depinning of ballistic active matter systems in disordered media" @default.
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- W2795302334 doi "https://doi.org/10.1103/physreve.97.052613" @default.
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- W2795302334 hasPublicationYear "2018" @default.
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