Fluctuation and self-diffusion research about dry granular materials under shearing
| Autor: | Shuai Ma, Fanjing Meng, Shaozhen Hua, Xin Meng |
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| Rok vydání: | 2019 |
| Předmět: |
Shearing (physics)
0209 industrial biotechnology Self-diffusion Materials science Mechanical Engineering Applied Mathematics General Engineering Aerospace Engineering 02 engineering and technology Mechanics Granular material Industrial and Manufacturing Engineering Discrete element method Shear rate 020901 industrial engineering & automation Granular matter Automotive Engineering Astrophysics::Solar and Stellar Astrophysics |
| Zdroj: | Journal of the Brazilian Society of Mechanical Sciences and Engineering. 41 |
| ISSN: | 1806-3691 1678-5878 |
| DOI: | 10.1007/s40430-019-1663-5 |
| Popis: | Flow and self-diffusion behaviors of granules in sheared granular systems are a typical study field but still not yet fully grasped because of the complexities and discreteness of granular matter systems. This paper presents a discrete element method-based simulation research of the fluctuation and self-diffusion characteristics of granules in a dense sheared granular system. Simulation results show that the average velocity of granules decreases with the altitude location, which is reverse to the variation of fluctuation velocity. It is noted that the model channel can be classified into “solid-like,” “oscillating” and “fluid-like” region according to the magnitude of shear rate and fluctuation velocity of granules. The self-diffusion of granules is greater in the “solid-like” region, but smaller in the “fluid-like” region. These findings emphasize the importance of research on macroscopic dynamics of granules, such as re-arrangement and self-diffusion of granular matter systems. |
| Databáze: | OpenAIRE |
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