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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 | 2019 |
| 形態種別 | 研究論文 |
| 査読 | 査読あり |
| 標題 | Avalanche Interpretation of the Power-Law Energy Spectrum in Three-Dimensional Dense Granular Flow |
| 執筆形態 | その他 |
| 掲載誌名 | Physical Review Letters |
| 出版社・発行元 | AMER PHYSICAL SOC |
| 巻・号・頁 | 122(18) |
| 著者・共著者 | Oyama, N.,Mizuno, H.,Saitoh, K. |
| 概要 | Turbulence is ubiquitous in nonequilibrium systems, and it has been noted that even dense granular flows exhibit characteristics that arc typical of turbulent flow, such as the power-law energy spectrum. However, studies on the turbulentlike behavior of granular flows are limited to two-dimensional (2D) flow. We demonstrate that the statistics in three-dimensional (3D) flow are qualitatively different from those in 2D flow. We also elucidate that avalanche dynamics can explain this dimensionality dependence. Moreover, we define clusters of collectively moving particles that arc equivalent to vortex filaments. The clusters unveil complicated structures in 3D flows that are absent in 2D flows. |
| DOI | 10.1103/PhysRevLett.122.188004 |
| ISSN | 0031-9007/1079-7114 |
| PermalinkURL | http://www.scopus.com/inward/record.url?eid=2-s2.0-85065825989&partnerID=MN8TOARS |
| researchmap用URL | http://orcid.org/0000-0002-3511-2710 |