解FOKKER-PLANCK-LANDAU方程的谱方法  

A Spectral Method for Fokker-Planck-Landau Equation

作　　者：王一博[1] 王尚武[1] 

机构地区：[1]国防科技大学光电科学与工程学院,湖南长沙410073

出　　处：《计算物理》2007年第2期153-158,共6页Chinese Journal of Computational Physics

摘　　要：利用谱方法和FFT技术对等离子体中带电粒子输运Fokker-Planck-Landau方程进行数值求解,研究空间均匀条件下粒子相空间分布函数随时间的演化.数值计算表明,所用计算格式能够很好地满足粒子数、动量和能量守恒要求,FFT技术的采用也使得运算工作量大为降低.A spectral method with FFT transformation is introduced in the numerical solution of the Fokker-Planck-Landau equation in describing charged particle transport fn plasma. The time evolution of the-distribution function in the velocity-space is studied with a ＂spacehomogeneous＂ condition. Numerical results show that conservations of mass, momentum and energy are held precisely. In addition, the computation cost is reduced considerably due to the adoption of FFT transformation.

关 键 词：带电粒子输运 Fokker-Planck-Landau方程 谱方法 快速傅立叶变换 

分 类 号：O532[理学—等离子体物理]