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Absorbing state transitions in granular materials close to jamming
Physical Review Letters ( IF 8.1 ) Pub Date : 
Christopher Ness and Michael E. Cates

We consider a model for driven particulate matter in which absorbing states can be reached both by particle isolation and by particle caging. The model predicts a non-equilibrium phase diagram in which analogues of hydrodynamic and elastic reversibility emerge at low and high volume fractions respectively, partially separated by a diffusive, non-absorbing region. We thus find a single phase boundary that spans the onset of chaos in sheared suspensions to the onset of yielding in jammed packings. This boundary has the properties of a non-equilibrium second order phase transition, leading us to write a Manna-like mean-field description that captures the model predictions. Dependent on contact details, jamming marks either a direct transition between the two absorbing states, or occurs within the diffusive region.

中文翻译:

颗粒材料中的吸收状态转变接近堵塞

我们考虑一种驱动颗粒物的模型,在该模型中,可以通过颗粒隔离和颗粒笼养来达到吸收状态。该模型预测了一个非平衡相图,其中流体动力学和弹性可逆性的类似物分别在低体积分数和高体积分数下出现,部分被扩散的非吸收区分开。因此,我们发现了一个单相边界,该边界跨越了剪切悬浮液中的混沌的开始到堵塞的填料中的屈服的开始。该边界具有非平衡二阶相变的特性,这使我们写出了类似于Manna的均值场描述来捕获模型预测。取决于接触的细节,干扰标记或者是两个吸收状态之间的直接过渡,或者是在扩散区域内发生。
更新日期:2020-01-27
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