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Computational model for multiscale simulation of laser ablation

Published online by Cambridge University Press:  21 March 2011

Leonid V. Zhigilei
Leonid V. Zhigilei*
Affiliation:
Department of Materials Science & Engineering, University of Virginia, Charlottesville, Virginia 22904 E-mail: lz2n@virginia.edu
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Abstract

Multiscale computational approach that combines different methods to study laser ablation phenomenon is presented. The methods include the molecular dynamics (MD) breathing sphere model for simulation of the initial stage of laser ablation, a combined MD - finite element method (FEM) approach for simulation of propagation of the laser-induced pressure waves out from the MD computational cell, and the direct simulation Monte Carlo (DSMC) method for simulation of the ablation plume expansion. The multiscale approach addresses different processes involved in laser ablation with appropriate resolutions and, at the same time, accounts for the interrelations between the processes. A description of the ablation plume appropriate for making a connection between the MD simulation of laser ablation and the DSMC simulation of the ablation plume expansion is discussed.

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References

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