Modelling of pulsed laser ablation of solids on the basis of thermal model and DSMC method
N.Yu. Bykov and G.A. Loukianov
St. Petersburg State Polytechnic University, Russia
Pages: 391–400
Abstract
Mathematical model of laser ablation of sublimating solid material into vacuum at moderate laser fluencies was proposed. Thermal model based on non-stationary one-dimension heat equation with a volume thermal source was used for the description of laser radiation absorption and solid material heating. The direct simulation Monte Carlo (DSMC) method was applied for modelling of vapour expansion into vacuum. The thermal and gas dynamic problems were bound at the surface by their boundary conditions. Laser ablation of a graphite target in nanosecond pulse duration range was considered as a test for applicability of the model.
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