摘要
研究了在具有剪切本底流的非磁化等离子体中离子声波的激发及其与涡旋的转化。从流体方程组出发,导出了描述低频静电扰动的微分方程组。采用非模方法,得到了扰动量的剪切傅里叶谐波分量随时间演化的方程组,并对方程组进行了数值分析。结果表明:在强剪切条件下,剪切旋涡可以转化为离子声波;同样地,离子声波也激发剪切旋涡。
Temporal evolution of the low frequency electrostatic perturbations in an unmagnetized plasma with strong shear flow is investigated. From fluid equations, the differential equations governing the low frequency electrostatic perturbations are deduced. Using the Nonmodal approach, the temporal evolution equations with Spatial Fourier Harmonics for the disturbed quantities are obtained, and have been studied numerically. Numerical calculations show that the shear vortices can be transformed into the ion sound waves under the condition of high shear parameter.
出处
《核聚变与等离子体物理》
CAS
CSCD
北大核心
2002年第4期227-231,共5页
Nuclear Fusion and Plasma Physics
基金
国家自然科学基金资助项目(10075047)
