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Pressure Waves in Microscopic Simulations of Laser Ablation Leonid

Published online by Cambridge University Press:  10 February 2011

V. Zhigilei  and
Barbara J. Garrison
V. Zhigilei
Affiliation:
Department of Chemistry, The Pennsylvania State University, University Park, PA 16802
Barbara J. Garrison
Affiliation:
Department of Chemistry, The Pennsylvania State University, University Park, PA 16802
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Abstract

Laser ablation of organic solids is a complex collective phenomenon that includes processes occurring at different length and time scales. A mesoscopic breathing sphere model developed recently for molecular dynamics simulation of laser ablation and damage of organic solids has significantly expanded the length-scale (up to hundreds of nanometers) and the time-scale (up to nanoseconds) of the simulations. The laser induced buildup of a high pressure within the absorbing volume and generation of the pressure waves propagating from the absorption region poses an additional challenge for molecular-level simulation. A new dynamic boundary condition is developed to minimize the effects of the reflection of the wave from the boundary of the computational cell. The boundary condition accounts for the laser induced pressure wave propagation as well as the direct laser energy deposition in the boundary region.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 538: Symposium J – Multiscale Modelling of Materials , 1998 , 491
Copyright
Copyright © Materials Research Society 1999

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