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简要介绍激光—靶耦合中 ,二维 ( y ,z)、三维 (x ,y ,z)成丝不稳定性数值模拟方法及计算结果。该方法包括非局域热传导和Landau阻尼。二维 ( y ,z)成丝过程的发展与一维双温单流体力学计算同步耦合 ,成丝的零级量由一维双温单流体力学计算提供。三维 (x ,y ,z)成丝的模拟采用固定时刻的零级量为背景进行计算。成丝过程的发展除与成丝背景有关外 ,还与扰动波长、入射激光强度、激光波长等有关。计算结果表明 :成丝不稳定的产生和发展 ,将严重影响光束质量 ,应进一步深入、系统地研究。
The numerical simulation method and calculation results of two-dimensional (y, z) and three-dimensional (x, y, z) silk instabilities in laser-target coupling are briefly introduced. The method includes non-local heat conduction and Landau damping. The development of two-dimensional (y, z) filament formation is synchronized with one-dimensional, two-temperature, single-fluid mechanics calculations. The zero-order volume of the filament is provided by a one-dimensional, two- The simulation of three-dimensional (x, y, z) filaments is calculated using zero-level quantities at fixed time as the background. In addition to the development of the process of filament formation and silk background, but also with the disturbance wavelength, incident laser intensity, laser wavelength and so on. The calculation results show that the generation and development of unstable filaments will seriously affect the beam quality and should be further studied systematically.