Abstract
Following some recent works that used first-order numerical schemes in modeling laser ablation, this paper compares the predictions of first- and second-order calculations for a one-dimensional kinetic theory model of laser ablation of carbon based on the moment solution of the Boltzmann equation for arbitrary strong evaporation. The model considers both conduction heat transfer in the target and gas dynamics of the ablated plume coupled through the interface boundary conditions. It was found that the difference between the first-order and the second-order calculations is limited to the parts of the flow with high gradients, such as the shock wave and the contact surface. Since the ablation rate is determined by the conditions at the solid surface, which is most of the time situated far from that area, the first-order calculation predicts ablation rate correctly.
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