Using simulations and a virtual-spring-based approach, we measure the segregation force, Fseg, over a range of size-bidisperse mixture concentrations, particle size ratios, and shear rates to develop a model for Fseg that extends its applicability from the well-studied non-interacting intruders regime to finite-concentration mixtures where cooperative phenomena occur. The model predicts the concentration below which the single intruder assumption applies and provides an accurate description of the pressure partitioning between species.
@article{arxiv.2108.11165,
title = {Segregation forces in dense granular flows: Closing the gap from single intruders to mixtures},
author = {Yifei Duan and Lu Jing and Paul B. Umbanhowar and Julio M. Ottino and Richard M. Lueptow},
journal= {arXiv preprint arXiv:2108.11165},
year = {2022}
}