Jamming of Frictional Particles: a Non-equilibrium First Order Phase Transition
arXiv:1311.5416 · doi:10.1103/PhysRevE.89.050201
Abstract
We propose a phase diagram for the shear flow of dry granular particles in two dimensions based on simulations and a phenomenological Landau-theory for a nonequilibrium first order phase transition. Our approach incorporates both frictional as well as frictionless particles. The most important feature of the frictional phase diagram is re-entrant flow and a critical jamming point at finite stress. In the frictionless limit the regime of re-entrance vanishes and the jamming transition is continuous with a critical point at zero stress. The jamming phase diagrams derived from the model agree with the experiments of Bi et al. (Nature (2011)) and brings together previously conflicting numerical results.
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