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Published on: April 19, 2018
Jamming of frictional particles: a nonequilibrium first-order phase transition
Matthias Grob1, Claus Heussinger2, Annette Zippelius3
1Max Planck Institute for Dynamics and Self-Organization, Am Faßberg 17, 37073 Göttingen, Germany.
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 reentrant flow and a critical jamming point at finite stress. In the frictionless limit the regime of reentrance 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 (London) 480, 355 (2011)] and brings together previously conflicting numerical results.
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