Dimensionality and viscosity exponent in shear-driven jamming

TL;DR

This study investigates shear-driven jamming in three dimensions, revealing that critical exponents differ from two-dimensional cases, indicating distinct universality classes for shear-driven jamming across dimensions.

Contribution

It provides the first direct comparison of shear-driven jamming critical exponents in 2D and 3D, challenging the assumption of universality across dimensions.

Findings

Critical exponents differ between 2D and 3D shear-driven jamming.

Shear-driven jamming belongs to different universality classes in 2D and 3D.

Contrasts with isotropic jamming behavior from compression or quench.

Abstract

Collections of bidisperse frictionless particles at zero temperature in three dimensions are simulated with a shear-driven dynamics with the aim to compare with behavior in two dimensions. Contrary to the prevailing picture, and in contrast to results from isotropic jamming from compression or quench, we find that the critical exponents in three dimensions are different from those in two dimensions and conclude that shear-driven jamming in two and three dimensions belong to different universality classes.