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サイトウ クニヤス
Kuniyasu Saitoh
齊藤 国靖 所属 京都産業大学 理学部 物理科学科 職種 教授 |
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| 言語種別 | 英語 |
| 発行・発表の年月 | 2016 |
| 形態種別 | 研究論文 |
| 査読 | 査読あり |
| 標題 | Anomalous energy cascades in dense granular materials yielding under simple shear deformations |
| 執筆形態 | その他 |
| 掲載誌名 | Soft Matter |
| 出版社・発行元 | ROYAL SOC CHEMISTRY |
| 巻・号・頁 | 12(5),pp.1360-1367 |
| 著者・共著者 | Saitoh, K.,Mizuno, H. |
| 概要 | By using molecular dynamics (MD) simulations of dense granular particles in two dimensions, we study turbulent-like structures of their non-affine velocities under simple shear deformations. We find that the spectrum of non-affine velocities, introduced as an analog of the energy spectrum for turbulent flows, exhibits the power-law decay if the system is yielding in a quasi-static regime, where large-scale collective motions and inelastic interactions of granular particles are crucial for the anomalous cascade of kinetic energy. Based on hydrodynamic equations of dense granular materials, which include both kinetic and contact contributions in constitutive relations, we derive a theoretical expression for the spectrum, where a good agreement between the result of MD simulations and theoretical prediction is established over a wide range of length scales. |
| DOI | 10.1039/c5sm02760h |
| ISSN | 1744-683X/1744-6848 |
| PermalinkURL | http://www.scopus.com/inward/record.url?eid=2-s2.0-84956993743&partnerID=MN8TOARS |
| researchmap用URL | http://orcid.org/0000-0002-3511-2710 |