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Simulation of cohesive head-on collisions of thermally activated nanoclusters

Hiroto Kuninaka and Hisao Hayakawa
Phys. Rev. E 79, 031309 – Published 30 March 2009
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Abstract

Impact phenomena of nanoclusters subject to thermal fluctuations are numerically investigated. From the molecular dynamics simulation for colliding two identical clusters, it is found that the restitution coefficient for head-on collisions has a peak at a colliding speed due to the competition between the cohesive interaction and the repulsive interaction of colliding clusters. Some aspects of the collisions can be understood by the theory of Brilliantov et al. [Phys. Rev. E 76, 051302 (2007)], but many aspects are found from the simulation. In particular, we find that there are some anomalous rebounds in which the restitution coefficient is larger than unity. The phase diagrams of rebound processes against impact speed and the cohesive parameter can be understood by a simple phenomenology.

    • Received 30 December 2008

    DOI:https://doi.org/10.1103/PhysRevE.79.031309

    ©2009 American Physical Society

    Authors & Affiliations

    Hiroto Kuninaka1,* and Hisao Hayakawa2

    • 1Department of Physics, Chuo University, Bunkyo-ku, Tokyo, Japan, 112-8551
    • 2Yukawa Institute for Theoretical Physics, Kyoto University, Sakyo-ku, Kyoto, Japan, 606-8502

    • *kuninaka@phys.chuo-u.ac.jp

    See Also

    Super Rebound

    Michael Schirber
    Phys. Rev. Focus 23, 10 (2009)

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    Issue

    Vol. 79, Iss. 3 — March 2009

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