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Dashti, Hor; Saberi, Abbas Ali; Rahbari, S. H. E.; Kurths, Jrgen
Science advances, 09/2023, Volume: 9, Issue: 35Journal Article
Jammed granular media and glasses exhibit spatial long-range correlations as a result of mechanical equilibrium. However, the existence of such correlations in the flowing matter, where the mechanical equilibrium is unattainable, has remained elusive. Here, we investigate this problem in the context of the percolation of interparticle forces in flowing granular media. We find that the flow rate introduces an effective long-range correlation, which plays the role of a relevant perturbation giving rise to a spectrum of varying exponents on a critical line as a function of the flow rate. Our numerical simulations along with analytical arguments predict a crossover flow rate γ ˙ c ≃ 1 0 − 5 below which the effect of induced disorder is weak and the universality of the force chain structure is shown to be given by the standard rigidity percolation. We also find a power-law behavior for the critical exponents with the flow rate γ ˙ > γ ˙ c . Flow rate induces long-range correlations to shape the force chain structure in the jammed granular media.
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