The spectrum of resistive MHD modes in cylindrical plasmas
The spectrum of resistive MHD modes in cylindrical plasmas
复制标题
圆柱形等离子体中电阻 MHD 模式的光谱
DOI：
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发表时间：
1984
影响因子：
2.5
通讯作者：
R. Grimm
中科院分区：
文献类型：
--
作者：
C. Ryu;R. Grimm
本文对圆柱形可压缩电阻性磁流体的简正模进行了数值研究。电阻率将理想MHD的剪切阿尔文和慢磁声连续分解为离散谱，并产生频率位于复平面特定线上的重阻尼模式。快磁声波受影响较小，但也受到阻尼。超稳定模态来自剪切阿尔文谱。示出了有利的平均曲率的稳定效果。本征函数说明了典型的正常模式的性质显示。
A numerical study of the normal modes of a compressible resistive MHD fluid in cylindrical geometry is presented. Resistivity resolves the shear Alfvén and slow magnetosonic continua of ideal MHD into discrete spectra and gives rise to heavily damped modes whose frequencies lie on specific lines in the complex plane. Fast magnetosonic waves are less affected but are also damped. Overstable modes arise from the shear Alfvén spectrum. The stabilizing effect of favourable average curvature is shown. Eigenfunctions illustrating the nature of typical normal modes are displayed.