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TECHNICAL PAPERS

Molecular Dynamics Simulation of Heat Transfer and Phase Change During Laser Material Interaction

[+] Author and Article Information
Xinwei Wang, Xianfan Xu

School of Mechanical Engineering, Purdue University, West Lafayette, IN 47907

J. Heat Transfer 124(2), 265-274 (Aug 15, 2001) (10 pages) doi:10.1115/1.1445289 History: Received March 30, 2001; Revised August 15, 2001
Copyright © 2002 by ASME
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Figures

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Scheme of the computational domain.
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Comparison of the velocity distribution by the MD simulation with the Maxwellian velocity distribution.
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Structure of the target in the x-z plane within the range of 0<x<12 nm and 0<y<12.6 nm.
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Temperature distribution in the target illuminated with a laser pulse of 0.06 J/m2 .
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Snapshots of atomic positions in argon illuminated with a laser pulse with a fluence of 0.7 J/m2 .
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Distribution of the number density of atoms at different times in argon illuminated with a laser pulse of 0.7 J/m2 .
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In-plane structures reflected by the atomic positions at different z locations at 20 ps.
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In-plane radial distribution functions at different z locations at 20 ps.
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(a) Positions, and (b) velocities of the solid-liquid interface and the liquid-vapor interface in argon illuminated with a laser pulse of 0.7 J/m2 .
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Velocity distributions at different z locations at 20 ps. Solid line: Maxwellian distribution; dots: MD simulation.
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Temperature distribution in argon illuminated with a laser pulse of 0.7 J/m2 .
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The stress evolution at the location of 9.5 nm in argon illuminated with a laser pulse of 0.7 J/m2 .
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Spatial distribution of the average velocity in the z direction in argon illuminated with a laser pulse of 0.7 J/m2 .
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(a) Thickness of the melted and vaporized solid, and (b) the rate of change in argon illuminated with a laser pulse of 0.7 J/m2 .
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The ablation depth induced by different laser fluences in argon.

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