Mesoscopic Physics of Granular Flows
Alexei V. Tkachenko, Vachtang Putkaradze
TL;DR
This paper develops a mesoscopic model for granular flows, distinguishing fluid and solid phases, and analyzes shear surface motion, avalanche velocity, and flow profiles in granular systems.
Contribution
It introduces a novel mesoscopic framework differentiating fluid and solid components in granular dynamics and models shear surface motion.
Findings
Velocity of developed avalanche depends on thickness
Density and velocity profiles match experimental observations
Shear surface motion is characterized by the model
Abstract
We present a description of granular dynamics based on the idea of differentiation between fluid and solid components. First, we construct a model of completely fluidized phase. Then we discuss a shear surface motion on the boundary of the bulk solid phase, induced by a moving wall. Our results include the thickness dependence of the velocity of a developed avalanche, density and velocity profiles in granular Couette flow experiment.
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Taxonomy
TopicsGranular flow and fluidized beds · Landslides and related hazards · Geotechnical and Geomechanical Engineering