Fine particle percolation in a sheared granular bed
Fuente:
arXiv
Enregistré dans:
| Auteurs principaux: | , , , |
|---|---|
| Format: | Preprint |
| Publié: |
2023
|
| Sujets: | |
| Accès en ligne: | |
| Tags: |
Ajouter un tag
Pas de tags, Soyez le premier à ajouter un tag!
|
| _version_ | 1866917640404992000 |
|---|---|
| author | Gao, Song Ottino, Julio M. Lueptow, Richard M. Umbanhowar, Paul B. |
| author_facet | Gao, Song Ottino, Julio M. Lueptow, Richard M. Umbanhowar, Paul B. |
| contents | 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 $R<R_t,$ $v_p$ initially increases with increasing shear rate, $\dotγ,$ as shear-driven bed rearrangement reduces fine-particle trapping but then decreases toward zero due to fine-particle excitation for $\dotγ\sqrt{d/g}\gtrsim 0.1$. For $R>R_t$, $v_p$ is constant at low $\dotγ$ but decreases toward zero at higher shear rates due to fine-particle excitation. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2310_05232 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Fine particle percolation in a sheared granular bed Gao, Song Ottino, Julio M. Lueptow, Richard M. Umbanhowar, Paul B. Soft Condensed Matter 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 $R<R_t,$ $v_p$ initially increases with increasing shear rate, $\dotγ,$ as shear-driven bed rearrangement reduces fine-particle trapping but then decreases toward zero due to fine-particle excitation for $\dotγ\sqrt{d/g}\gtrsim 0.1$. For $R>R_t$, $v_p$ is constant at low $\dotγ$ but decreases toward zero at higher shear rates due to fine-particle excitation. |
| title | Fine particle percolation in a sheared granular bed |
| topic | Soft Condensed Matter |
| url | https://arxiv.org/abs/2310.05232 |