Alignment-induced depression and shear thinning in granular matter of nonspherical particles

Rahim H, Angelidakis V, Pöschel T, Roy S (2024)

Publication Type: Journal article

Publication year: 2024

Journal

Physical Review Fluids American Physical Society

Book Volume: 9

Article Number: 114304

Journal Issue: 11

DOI: 10.1103/PhysRevFluids.9.114304

Abstract

When granular materials of shape-anisotropic grains are sheared in a split-bottom shear cell, a localized shear band is formed with a depression at its center. This effect is closely related to the alignment of the particles with the increase in aspect ratio, which, in turn, influences the local packing density, the stress distribution, and the system's overall bulk rheology. Particles with large aspect ratio tend to align with the shear direction, which increases the packing density in the shear band and affects rheological properties like stress, macroscopic friction coefficient, and effective viscosity. A scaling law correlates particle aspect ratio to macroscopic friction and effective viscosity, revealing shear-thinning behavior in bulk and near the surface.

Authors with CRIS profile

Huzaif Rahim Lehrstuhl für Multiscale Simulation of Particulate Systems (MSS) Vasileios Angelidakis Lehrstuhl für Multiscale Simulation of Particulate Systems (MSS) Thorsten Pöschel Lehrstuhl für Multiscale Simulation of Particulate Systems (MSS) Sudeshna Roy Lehrstuhl für Multiscale Simulation of Particulate Systems (MSS)

How to cite

APA:

Rahim, H., Angelidakis, V., Pöschel, T., & Roy, S. (2024). Alignment-induced depression and shear thinning in granular matter of nonspherical particles. Physical Review Fluids, 9(11). https://doi.org/10.1103/PhysRevFluids.9.114304

MLA:

Rahim, Huzaif, et al. "Alignment-induced depression and shear thinning in granular matter of nonspherical particles." Physical Review Fluids 9.11 (2024).

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