Enhancing system kinetics through size segregation in granular materials
文献类型：期刊论文
| 作者 | Guo, Jian1,2; Wang, Guodong1; Li, Yao1 |
| 刊名 | POWDER TECHNOLOGY
 |
| 出版日期 | 2025-03-31 |
| 卷号 | 454页码:120706 |
| 关键词 | Segregation Interlayer slippage Kinetic energy Granular media Long-runout landslide Discrete element methods |
| ISSN号 | 0032-5910 |
| DOI | 10.1016/j.powtec.2025.120706 |
| 产权排序 | 1 |
| 文献子类 | Article |
| 英文摘要 | The segregation process is a remarkable phenomenon in granular materials found in nature, occasionally accompanied by interlayer slippage. However, their impacts on system kinetic energy remain unclear. This study aims to quantitatively analyze the relationships between interlayer slippage, kinetic energy fluctuations, and fluidity during the segregation process of granular materials using three-dimensional Discrete Element Method simulations. The simulation parameters include size ratios (Sr: 0.5-1.0), volume ratios (Vr: 0.2-0.8), and inclination slopes (delta: 10 degrees-30 degrees). The results show that interlayer slippage at the top significantly reduces the degree of segregation, while slippage at the bottom has a smaller effect. A positive correlation is observed between kinetic energy and the degree of segregation, with the correlation being more pronounced on steeper slopes. Moreover, minimal vertical kinetic energy fluctuations induced by segregation significantly enhance granular fluidity, whereas interlayer slippage can reduce system kinetic energy by at least 50 %. These findings indicate that the widespread segregation process observed in long-runout landslides may promote their extreme mobility and destructive power by enhancing granular fluidity. This study may provide insights into granular system dynamics and practical guidance for landslide disaster prevention and mitigation. |
| URL标识 | 查看原文 |
| WOS关键词 | ROCK AVALANCHE ; DEBRIS-FLOW ; PARTICLE-SIZE ; KINEMATICS ; LANDSLIDE ; INSIGHTS ; MODELS |
| WOS研究方向 | Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:001422998200001 |
| 出版者 | ELSEVIER |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/212284]  |
| 专题 | 陆地表层格局与模拟院重点实验室_外文论文 |
| 通讯作者 | Wang, Guodong |
| 作者单位 | 1.Tsinghua Univ, State Key Lab Hydrosci & Engn, Beijing 100084, Peoples R China 2.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Beijing 100101, Peoples R China; |
| 推荐引用方式 GB/T 7714 | Guo, Jian,Wang, Guodong,Li, Yao. Enhancing system kinetics through size segregation in granular materials[J]. POWDER TECHNOLOGY,2025,454:120706. |
| APA | Guo, Jian,Wang, Guodong,&Li, Yao.(2025).Enhancing system kinetics through size segregation in granular materials.POWDER TECHNOLOGY,454,120706. |
| MLA | Guo, Jian,et al."Enhancing system kinetics through size segregation in granular materials".POWDER TECHNOLOGY 454(2025):120706. |
入库方式： OAI收割
来源：地理科学与资源研究所
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