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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 | 2014/09 |
| 形態種別 | 研究論文 |
| 査読 | 査読あり |
| 標題 | Collective motion of macroscopic spheres floating on capillary ripples: Dynamic heterogeneity and dynamic criticality |
| 執筆形態 | その他 |
| 掲載誌名 | Physical Review E - Statistical, Nonlinear, and Soft Matter Physics |
| 出版社・発行元 | AMER PHYSICAL SOC |
| 巻・号・頁 | 90(3) |
| 著者・共著者 | SanlI, C.,Saitoh, K.,Luding, S.,Van Der Meer, D. |
| 概要 | When a densely packed monolayer of macroscopic spheres floats on chaotic capillary Faraday waves, a coexistence of large scale convective motion and caging dynamics typical for glassy systems is observed. We subtract the convective mean flow using a coarse graining (homogenization) method and reveal subdiffusion for the caging time scales followed by a diffusive regime at later times. We apply the methods developed to study dynamic heterogeneity and show that the typical time and length scales of the fluctuations due to rearrangements of observed particle groups significantly increase when the system approaches its largest experimentally accessible packing concentration. To connect the system to the dynamic criticality literature, we fit power laws to our results. The resultant critical exponents are consistent with those found in densely packed suspensions of colloids. |
| DOI | 10.1103/PhysRevE.90.033018 |
| ISSN | 1539-3755/1550-2376 |
| PermalinkURL | http://www.scopus.com/inward/record.url?eid=2-s2.0-84908052404&partnerID=MN8TOARS |
| researchmap用URL | http://orcid.org/0000-0002-3511-2710 |