2021/03/20 by Martin Trulsson, Trulsson, Martin · 1 citation
Engineering · Materials Science · Mathematics · Physics and Astronomy · #Brownian motion #Classical mechanics #Condensed matter physics #Ellipse #Geology #Geometry #Granular flow and fluidized beds #Isotropy #Jamming #Material Dynamics and Properties #Mathematics #Mechanics #Optics #Physics #Pickering emulsions and particle stabilization #Rheology #Shear (geology) #Shear flow #Shear rate #Shear stress #Simple shear #Thermodynamics #cond-mat.soft
paper · pdf · doi:10.48550/arxiv.2103.11115
published in arXiv (Cornell University) (Cornell University) · 5 pages, 6 figures, 2 pages SI, 3 figures in SI
openalex publication_date 2021/03/20 · arxiv created 2021/05/19 · arxiv updated 2021/05/20 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
In this work we, study shear reversals of dense non-Brownian suspensions composed of cohesionless elliptical particles. By numerical simulations, we show that a new fragility appears for frictionless ellipses in the flowing states, where particles can flow indefinitely in one direction at applied shear stresses but shear-jams in the other direction upon shear stress reversal. This new fragility, absent in the isotropic particle case, is linked to the directional order of the elongated particles at steady shear and its reorientation at shear stress reversal, which forces the suspensions to pass through a more disordered state with an increased number of contacts in which it might get arrested.