Spatiotemporal Behavior of Void Collapse in Shocked Solids

Takahiro Hatano
Phys. Rev. Lett. 92, 015503 – Published 9 January 2004

Abstract

Molecular dynamics simulations on a three-dimensional defective Lennard-Jones solid containing a void are performed in order to investigate detailed properties of hot spot generation. In addition to the temperature, I monitor the number of energetically colliding particles which characterizes the intensity of shock-enhanced chemistry. This quantity normalized by void volume is found to saturate for nanoscale voids and to be maximized after voids have completely collapsed. It makes an apparent comparison to the temperature which requires much larger void for the enhancement and becomes maximum during the early stage of the collapse. It is also found that the average velocity and the temperature of ejected molecules inside a cubic void are enhanced during the collapse because of the focusing of momentum and energy towards the centerline of a void.

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  • Received 25 June 2003

DOI:https://doi.org/10.1103/PhysRevLett.92.015503

©2004 American Physical Society

Authors & Affiliations

Takahiro Hatano

  • Center for Promotion of Computational Science and Engineering, Japan Atomic Energy Research Institute, Ibaraki 319-1195, Japan

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Vol. 92, Iss. 1 — 9 January 2004

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