物理
WKB近似
热传导
惯性约束聚变
弗劳德数
热导率
不稳定性
机械
非线性系统
波长
长度刻度
计算物理学
等离子体
光学
热力学
量子力学
流量(数学)
作者
R. Betti,V. N. Goncharov,R. L. McCrory,P. Sorotokin,C. P. Verdon
出处
期刊:Physics of Plasmas
[American Institute of Physics]
日期:1996-05-01
卷期号:3 (5): 2122-2128
被引量:117
摘要
The linear stability analysis of accelerated ablation fronts is carried out self-consistently by retaining the effect of finite thermal conductivity. Its temperature dependence along with the density gradient scale length are adjusted to fit the density profiles obtained in the one-dimensional simulations. The effects of diffusive radiation transport are included through the nonlinear thermal conductivity (κ∼Tν). The growth rate is derived by using a boundary layer analysis for Fr≫1 (Fr is the Froude number) and a WKB approximation for Fr≪1. The self-consistent Atwood number depends on the mode wavelength and the power law index for thermal conduction. The analytic growth rate and cutoff wave number are in good agreement with the numerical solutions for arbitrary ν≳1.
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