|
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 |
|
| 言語種別 | 英語 |
| 発行・発表の年月 | 2010/11 |
| 形態種別 | 研究論文 |
| 査読 | 査読あり |
| 標題 | Negative normal restitution coefficient found in simulation of nanocluster collisions |
| 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 | 105(23) |
| 著者・共著者 | Saitoh, K.,Bodrova, A.,Hayakawa, H.,Brilliantov, N.V. |
| 概要 | The oblique impacts of nanoclusters are studied theoretically and by means of molecular dynamics. In simulations we explore two models-Lennard-Jones clusters and particles with covalently bonded atoms. In contrast with the case of macroscopic bodies, the standard definition of the normal restitution coefficient yields for this coefficient negative values for oblique collisions of nanoclusters. We explain this effect and propose a proper definition of the restitution coefficient which is always positive. We develop a theory of an oblique impact based on a continuum model of particles. A surprisingly good agreement between the macroscopic theory and simulations leads to the conclusion that macroscopic concepts of elasticity, bulk viscosity, and surface tension remain valid for nanoparticles of a few hundred atoms. |
| DOI | 10.1103/PhysRevLett.105.238001 |
| ISSN | 0031-9007 |
| PermalinkURL | http://www.scopus.com/inward/record.url?eid=2-s2.0-78649723742&partnerID=MN8TOARS |
| researchmap用URL | http://orcid.org/0000-0002-3511-2710 |