A constraint-based approach to granular dispersion rheology
B. M. Guy, J. A. Richards, D. J. M. Hodgson, E. Blanco, W. C. K., Poon
TL;DR
This paper introduces a phenomenological, constraint-based model for granular suspension rheology that captures experimental flow behaviors and singularities without relying on specific microphysical details.
Contribution
It proposes a generic, stress-dependent constraint framework for modeling granular suspension flow, unifying various experimental observations.
Findings
Predicts singularities in viscosity and yield stress
Derives a range of flow curves from a single model
Aligns with existing experimental data
Abstract
We present a phenomenological model for granular suspension rheology in which particle interactions enter as constraints to relative particle motion. By considering constraints that are formed and released by stress respectively, we derive a range of experimental flow curves in a single treatment and predict singularities in viscosity and yield stress consistent with literature data. Fundamentally, we offer a generic description of suspension flow that is independent of bespoke microphysics.
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