激光烧蚀材料的数值模拟

I. Amirkhanov, N. Sarker, I. Sarkhadov
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引用次数: 0

摘要

本文报道了用超短激光脉冲对材料进行激光烧蚀的数值模拟。在与运动蒸发锋相关的坐标系中,用一维非平稳热传导方程描述了激光烧蚀的热机理。通过热导方程中的源函数来考虑激光作用,这些函数决定了激光源的坐标和时间依赖性。在给定辐照剂量下,得到了样品在不同时刻的温度分布、样品边界因蒸发而发生位移的动力学、该边界的速度以及样品在移动边界处的温度。得到了样品表面最高温度和烧蚀层厚度与入射激光剂量的关系。采用有限差分法进行了数值计算。所得结果与作者其他著作的结果一致。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Numerical modeling of laser ablation of materials
In this paper, we report a numerical simulation of laser ablation of a material by ultrashort laser pulses. The thermal mechanism of laser ablation is described in terms of a one-dimensional nonstationary heat conduction equation in a coordinate system associated with a moving evaporation front. The laser action is taken into account through the functions of the source in the thermal conductivity equation that determine the coordinate and time dependence of the laser source. For a given dose of irradiation of the sample, the profiles of the sample temperature at different times, the dynamics of the displacement of the sample boundary due to evaporation, the velocity of this boundary, and the temperature of the sample at the moving boundary are obtained. The dependence of the maximum temperature on the sample surface and the thickness of the ablation layer on the radiation dose of the incident laser pulse is obtained. Numerical calculations were performed using the finite difference method. The obtained results agree with the results of other works obtained by their authors.
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CiteScore
0.60
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20
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10 weeks
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