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arXiv · 2108.11165

Segregation forces in dense granular flows: Closing the gap from single intruders to mixtures

Yifei Duan·Lu Jing·Paul B. Umbanhowar·Julio M. Ottino·Richard M. Lueptow
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Abstract

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.

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Yifei Duan, Lu Jing, Paul B. Umbanhowar, Julio M. Ottino, Richard M. Lueptow. 2021-08-25. Segregation forces in dense granular flows: Closing the gap from single intruders to mixtures. https://doi.org/10.1017/jfm.2022.12

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