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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 | 2015 |
| 形態種別 | 研究論文 |
| 査読 | 査読あり |
| 標題 | Hydrodynamic instabilities in shear flows of dry cohesive granular particles |
| 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 | 11(32),pp.6371-6385 |
| 著者・共著者 | Kuniyasu Saitoh,Satoshi Takada,Hisao Hayakawa |
| 概要 | We extend the dynamic van der Waals model introduced by A. Onuki [Phys. Rev. Lett., 2005, 94, 054501] to the description of cohesive granular flows under a plane shear to study their hydrodynamic instabilities. By numerically solving the dynamic van der Waals model, we observed various heterogeneous structures of density fields in steady states, where the viscous heating is balanced with the energy dissipation caused by inelastic collisions. Based on the linear stability analysis, we found that the spatial structures are determined by the mean volume fraction, the applied shear rate, and the inelasticity, where the instability is triggered if the system is thermodynamically unstable, i.e. the pressure, p, and the volume fraction, phi, satisfy partial derivative p/partial derivative phi < 0. |
| DOI | 10.1039/c5sm01160d |
| ISSN | 1744-683X/1744-6848 |