Granular avalanche statistics in rotating drum with varied particle roughness
We experimentally investigate the avalanche statistics of dry granular materials in a slowly rotating drum for five types of beads with varied surface roughness. For all beads, two distinct angles, i.e., repose angle $\theta_r$ and maximal angle $\theta_m$, can be clearly defined, and the avalanche...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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Science Press
2023-04-01
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| Series: | National Science Open |
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| Online Access: | https://www.sciengine.com/doi/10.1360/nso/20220069 |
| _version_ | 1797808291722559488 |
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| author | Peng Aoran Yuan Ye Wang Yujie |
| author_facet | Peng Aoran Yuan Ye Wang Yujie |
| author_sort | Peng Aoran |
| collection | DOAJ |
| description | We experimentally investigate the avalanche statistics of dry granular materials in a slowly rotating drum for five types of beads with varied surface roughness. For all beads, two distinct angles, i.e., repose angle $\theta_r$ and maximal angle $\theta_m$, can be clearly defined, and the avalanche size distributions $P( δ\theta)$ are Gaussian-like. $\theta_r$, $\theta_m$, and the span in $P( δ\theta)$ are all positively correlated with bead surface roughness. This observation thus contrasts with a power-law $P( δ\theta)$ predicted by self-organized criticality, but is reminiscent of a first-order phase transition. We speculate that both the inertia effect and the velocity-weakening mechanism during an avalanche process can enhance the first-order features, which are however absent in plasticity of sheared amorphous solids. We also discuss the dependence between $\theta_r$ and $\theta_m$ for various particles, as well as the correlation between starting and stopping angles for an individual avalanche. |
| first_indexed | 2024-03-13T06:35:25Z |
| format | Article |
| id | doaj.art-cc9980cf3de84cafb5396a4c40e194e4 |
| institution | Directory Open Access Journal |
| issn | 2097-1168 |
| language | English |
| last_indexed | 2024-03-13T06:35:25Z |
| publishDate | 2023-04-01 |
| publisher | Science Press |
| record_format | Article |
| series | National Science Open |
| spelling | doaj.art-cc9980cf3de84cafb5396a4c40e194e42023-06-09T06:20:43ZengScience PressNational Science Open2097-11682023-04-01210.1360/nso/20220069eb33e642Granular avalanche statistics in rotating drum with varied particle roughnessPeng Aoran0Yuan Ye1Wang Yujie2["School of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240, China"]["School of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240, China"]["School of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240, China","State Key Laboratory of Geohazard Prevention and Geoenvironment Protection, Chengdu University of Technology, Chengdu 610059, China","Department of Physics, College of Mathematics and Physics, Chengdu University of Technology, Chengdu 610059, China"]We experimentally investigate the avalanche statistics of dry granular materials in a slowly rotating drum for five types of beads with varied surface roughness. For all beads, two distinct angles, i.e., repose angle $\theta_r$ and maximal angle $\theta_m$, can be clearly defined, and the avalanche size distributions $P( δ\theta)$ are Gaussian-like. $\theta_r$, $\theta_m$, and the span in $P( δ\theta)$ are all positively correlated with bead surface roughness. This observation thus contrasts with a power-law $P( δ\theta)$ predicted by self-organized criticality, but is reminiscent of a first-order phase transition. We speculate that both the inertia effect and the velocity-weakening mechanism during an avalanche process can enhance the first-order features, which are however absent in plasticity of sheared amorphous solids. We also discuss the dependence between $\theta_r$ and $\theta_m$ for various particles, as well as the correlation between starting and stopping angles for an individual avalanche.https://www.sciengine.com/doi/10.1360/nso/20220069granular materialsavalancherotating drum |
| spellingShingle | Peng Aoran Yuan Ye Wang Yujie Granular avalanche statistics in rotating drum with varied particle roughness National Science Open granular materials avalanche rotating drum |
| title | Granular avalanche statistics in rotating drum with varied particle roughness |
| title_full | Granular avalanche statistics in rotating drum with varied particle roughness |
| title_fullStr | Granular avalanche statistics in rotating drum with varied particle roughness |
| title_full_unstemmed | Granular avalanche statistics in rotating drum with varied particle roughness |
| title_short | Granular avalanche statistics in rotating drum with varied particle roughness |
| title_sort | granular avalanche statistics in rotating drum with varied particle roughness |
| topic | granular materials avalanche rotating drum |
| url | https://www.sciengine.com/doi/10.1360/nso/20220069 |
| work_keys_str_mv | AT pengaoran granularavalanchestatisticsinrotatingdrumwithvariedparticleroughness AT yuanye granularavalanchestatisticsinrotatingdrumwithvariedparticleroughness AT wangyujie granularavalanchestatisticsinrotatingdrumwithvariedparticleroughness |