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arXiv · 2310.05232

Fine particle percolation in a sheared granular bed

Song Gao·Julio M. Ottino·Richard M. Lueptow·Paul B. Umbanhowar
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Abstract

We study the percolation velocity, $v_p,$ of a fine spherical particle in a sheared large-particle bed under gravity using discrete element method simulations for large-to-fine particle diameter ratios, $R=d/d_f,$ below and above the free-sifting threshold, $R_t\approx6.5.$ For $R R_t$, $v_p$ is constant at low $\dot\gamma$ but decreases toward zero at higher shear rates due to fine-particle excitation.

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Song Gao, Julio M. Ottino, Richard M. Lueptow, Paul B. Umbanhowar. 2023-10-08. Fine particle percolation in a sheared granular bed. https://doi.org/10.1103/physrevresearch.6.l022015

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