| 由强激光产生的烧蚀等离子体随时间演化的数值模拟 |
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| 引用本文： | 童慧峰,唐志平,张凌. 由强激光产生的烧蚀等离子体随时间演化的数值模拟[J]. 计算物理, 2007, 24(6): 667-672 |
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| 作者姓名： | 童慧峰 唐志平 张凌 |
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| 作者单位： | 中国工程物理研究院流体物理研究所,四川,绵阳,621900;中国科学技术大学力学和机械工程系,中科院材料力学行为与设计重点实验室,安徽,合肥,230026;中国科学技术大学力学和机械工程系,中科院材料力学行为与设计重点实验室,安徽,合肥,230026 |
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| 摘 要： | 采用单流体模型描述由强激光产生的烧蚀等离子体,并用具有五阶精度的广义Godunov差分格式——加权本质无振荡格式对该模型进行离散化,考虑激光与等离子体相互作用和能量耦合,数值模拟强激光与固体靶相互作用时产生的烧蚀等离子体随时间演化的物理过程,给出数值模拟结果,并对其进行分析和讨论.数值模拟结果表明,激光能量在靶面等离子体中被强烈吸收,激光支持LSD(Laser Supported Detonation)波速度约为理想LSD波速度的一半.
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| 关 键 词： | 有限差分 数值模拟 激光支持等离子体 |
| 文章编号： | 1001-246X（2007）06-0667-07 |
| 收稿时间： | 2005-12-02 |
| 修稿时间： | 2007-03-27 |
Numerical Simulation on Evolution of Ablation Plasma Generated by Strong Laser |
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| TONG Huifeng,TANG Zhiping,ZHANG Ling. Numerical Simulation on Evolution of Ablation Plasma Generated by Strong Laser[J]. Chinese Journal of Computational Physics, 2007, 24(6): 667-672 |
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| Authors: | TONG Huifeng TANG Zhiping ZHANG Ling |
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| Affiliation: | 1. Institute of Fluid Physics, CAEP, Mianyang 621900, China;2. CAS Key Laboratory for Mechanical Behavior and Design of Materials, Department of Mechanics and Mechanical Engineering, University of Science and Technology of China, Hefei 230026, China |
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| Abstract: | A general Godunov finite difference scheme—WENO(Weighted Essentially Non-Oscillatory) scheme with fifth-order accuracy is used to calculate 2-dimensional axis symmetrical laser-supported plasma flow field under laser ablated solid target,considering ionization degree of plasma and the interaction and coupling between laser beam and plasma.Evolution of the ablation plasma due to the interaction between laser and solid target is obtained.The simulation shows that the laser beam is strong absorbed by plasma on target surface,and the velocity of LSD(Laser Supported Detonation) wave is half of the ideal LSD derived with C-J detonation theory. |
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| Keywords: | finite difference numerical simulation laser-supported plasma flow field |
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