Flow, Ordering and Jamming of Sheared Granular Suspensions

Abstract

We study the rheological properties of a granular suspension subject to constant shear stress by constant volume molecular dynamics simulations. We derive the system `flow diagram' in the volume fraction/stress plane $(\varphi ,F)$: at low $\varphi$ the flow is disordered, with the viscosity obeying a Bagnold-like scaling only at small $F$ and diverging as the jamming point is approached; if the shear stress is strong enough, at higher $\varphi$ an ordered flow regime is found, the order/disorder transition being marked by a sharp drop of the viscosity. A broad jamming region is also observed where, in analogy with the glassy region of thermal systems, slow dynamics followed by kinetic arrest occurs when the ordering transition is prevented.

4 pages

References in corpus (3)

• Jamming, Force Chains and Fragile Matter
• Granular flow down an inclined plane: Bagnold scaling and rheology
• Hysteresis and competition between disorder and crystallization in sheared and vibrated granular flow

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• 'Flow & Jam' of frictional athermal systems under shear stress
• Unconventional rheological properties in systems of deformable particles
• Rheology and Shear Band Suppression in Particle and Chain Mixtures
• The role of dilation and confining stresses in shear thickening of dense suspensions
• Validation of Models for the Flow of Granular Media
• Statistical Inference for Disordered Sphere Packings