Zeus-2D Simulations of Laser-Driven Radiative Shock Experiments
Zeus-2D Simulations of Laser-Driven Radiative Shock Experiments
复制标题
激光驱动辐射冲击实验的 Zeus-2D 模拟
DOI：
--
复制
发表时间：
2005
期刊：
影响因子：
--
通讯作者：
J. Stone
中科院分区：
文献类型：
--
作者：
D. Leibrandt;R. P. Drake;J. Stone
一系列实验正在进行中，使用欧米茄激光来检查与天体物理学相关的辐射冲击。在这些实验中，激光加速了一层薄的低z材料，从而对氙气产生强烈的冲击。利用HYADES辐射流体动力学代码进行一维数值模拟，预测辐射冷却将导致受冲击的氙在空间上坍缩，产生高密度的薄层（即坍缩激波）。初步的实验结果表明，如果所有的氙都聚集在激波氙层中，并且x射线源是纯Kα源，那么激波氙层的不透明程度要比预期的低。然而，这两种假设都不是严格正确的。在这里，我们探讨径向质量和/或能量输运是否可能对系统的动力学有重要意义。我们报告了使用ZEUS-2D天体物理流体动力学代码进行二维数值模拟的结果。特别注意的是模拟方法。
A series of experiments is underway using the Omega laser to examine radiative shocks of astrophysical relevance. In these experiments, the laser accelerates a thin layer of low-Z material, which drives a strong shock into xenon gas. One-dimensional numerical simulations using the HYADES radiation hydrodynamics code predict that radiation cooling will cause the shocked xenon to collapse spatially, producing a thin layer of high density (i.e., a collapsed shock). Preliminary experimental results show a less opaque layer of shocked xenon than would be expected assuming that all the xenon accumulates in the layer and that the X-ray source is a pure Kα source. However, neither of these assumptions is strictly correct. Here we explore whether radial mass and/or energy transport may be significant to the dynamics of the system. We report the results of two-dimensional numerical simulations using the ZEUS-2D astrophysical fluid dynamics code. Particular attention is given to the simulation method.