Shear-driven flow of athermal, frictionless, spherocylinder suspensions in two dimensions: Spatial structure and correlations
| Autor: | Stephen Teitel, Theodore A. Marschall |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Physics
Shearing (physics) Statistical Mechanics (cond-mat.stat-mech) FOS: Physical sciences Angular velocity Mechanics Condensed Matter - Soft Condensed Matter 01 natural sciences 010305 fluids & plasmas Physics::Fluid Dynamics Condensed Matter::Soft Condensed Matter Simple shear Rheology Drag Finite strain theory 0103 physical sciences Newtonian fluid Soft Condensed Matter (cond-mat.soft) 010306 general physics Particle density Condensed Matter - Statistical Mechanics |
| Zdroj: | Physical Review E. 101 |
| ISSN: | 2470-0053 2470-0045 |
| Popis: | We use numerical simulations to study the flow of athermal, frictionless, soft-core two dimensional spherocylinders driven by a uniform steady-state simple shear applied at a fixed volume and a fixed finite strain rate $\dot\gamma$. Energy dissipation is via a viscous drag with respect to a uniformly sheared host fluid, giving a simple model for flow in a non-Brownian suspension with Newtonian rheology. We study the resulting spatial structure of the sheared system, and compute correlation functions of the velocity, the particle density, the nematic order parameter, and the particle angular velocity. Correlations of density, nematic order, and angular velocity are shown to be short ranged both below and above jamming. We compare a system of size-bidisperse particles with a system of size-monodisperse particles, and argue how differences in spatial order as the packing increases leads to differences in the global nematic order parameter. We consider the effect of shearing on initially well ordered configurations, and show that in many cases the shearing acts to destroy the order, leading to the same steady-state ensemble as found when starting from random initial configurations. Comment: 20 pages, 25 figures. Updated to reflect published version. arXiv admin note: substantial text overlap with arXiv:1909.08669 |
| Databáze: | OpenAIRE |
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