Orientational Ordering in Athermally Sheared, Aspherical, Frictionless Particles

Abstract

We numerically simulate the uniform athermal shearing of bidisperse, frictionless, two dimensional spherocylinders and three dimensional prolate ellipsoids. We focus on the orientational ordering of particles as an asphericity parameter $\alpha \to 0$ and particles approach spherical. We find that the nematic order parameter $S_2$ is non-monotonic in the packing fraction $\varphi$, and that as $\alpha \to 0$ $S_2$ stays finite at jamming and above. The approach to spherical particles thus appears to be singular. We also find that sheared particles continue to rotate above jamming, and that particle contacts preferentially lie along the narrowest width of the particles, even as $\alpha \to 0$.

arXiv commentupdated to published version with greatly expanded supplemental material: 5 pages, 5 figures, plus supplemental material of 7 pages, 11 figures

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Cited by in corpus (14)

• Shear-Driven Flow of Athermal, Frictionless, Spherocylinder Suspensions in Two Dimensions: Stress, Jamming, and Contacts
• Demixing and tetratic ordering in some binary mixtures of hard superellipses
• Reversibility of granular rotations and translations
• Random sequential adsorption of partially ordered discorectangles onto a continuous plane
• Shear-Driven Flow of Athermal, Frictionless, Spherocylinder Suspensions in Two Dimensions: Particle Rotations and Orientational Ordering
• Extended $\mu (J)$-rheology for dense suspensions at oscillatory shear flows
• Athermal shearing of frictionless cross-shaped particles of varying aspect ratio
• Shear thickening of suspensions of dimeric particles
• Shear-Driven Flow of Athermal, Frictionless, Spherocylinder Suspensions in Two Dimensions: Spatial Structure and Correlations
• Depletion Forces in Athermally Sheared Mixtures of Frictionless Disks and Rods in Two Dimensions
• Implementation note on a minimal hybrid lubrication/granular dynamics model for dense suspensions
• Orientational arrest in dense suspensions of elliptical particles under oscillatory shear flows
• Translational and rotational velocities in shear-driven jamming of ellipsoidal particles
• Shear flow of frictional spheroids: Comparison between elongated and flattened particles