Propagating irreversibility fronts in cyclically sheared suspensions Article Swipe
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· 2022
· Open Access
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· DOI: https://doi.org/10.1103/physrevresearch.4.013025
· OA: W3212014153
The interface separating a liquid from its vapor phase is diffuse: the\ncomposition varies continuously from one phase to the other over a finite\nlength. Recent experiments on dynamic jamming fronts in two dimensions\n[Waitukaitis et al., Europhysics Letters 102, 44001 (2013)] identified a\ndiffuse interface between jammed and unjammed discs. In both cases, the\nthickness of the interface diverges as a critical transition is approached. We\ninvestigate the generality of this behavior using a third system: a model of\ncyclically-sheared non-Brownian suspensions. As we sediment the particles\ntowards a boundary, we observe a diffuse traveling front that marks the\ninterface between irreversible and reversible phases. We argue that the front\nwidth is linked to a diverging correlation lengthscale in the bulk, which we\nprobe by studying avalanches near criticality. Our results show how diffuse\ninterfaces may arise generally when an incompressible phase is brought to a\ncritical point.\n
