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.
@article{arxiv.1807.11356,
title = {A constraint-based approach to granular dispersion rheology},
author = {B. M. Guy and J. A. Richards and D. J. M. Hodgson and E. Blanco and W. C. K. Poon},
journal= {arXiv preprint arXiv:1807.11356},
year = {2018}
}