Negative normal restitution coefficient found in simulation of nanocluster collisions

Kuniyasu Saitoh, Anna Bodrova, Hisao Hayakawa, Nikolai V. Brilliantov

研究成果: Article査読

48 被引用数 (Scopus)

抄録

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.

本文言語English
論文番号238001
ジャーナルPhysical Review Letters
105
23
DOI
出版ステータスPublished - 2010 11月 30
外部発表はい

ASJC Scopus subject areas

  • 物理学および天文学(全般)

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