Saturation of the magnetorotational instability
Saturation of the magnetorotational instability
复制标题
磁旋转不稳定性的饱和
DOI：
10.1063/1.2047592
复制
发表时间：
2005
影响因子：
4.6
通讯作者：
K. Julien
中科院分区：
文献类型：
--
作者：
E. Knobloch;K. Julien
一个分析理论的发展，渐近准确地描述的非线性饱和的过程中的磁旋转不稳定性的模型问题，采用线性剪切流在均匀旋转的通道。理论表明，不稳定性的饱和是通过改变引起不稳定性的剪切来实现的，饱和过程需要粘性耗散和欧姆耗散。该理论还描述了从小振幅扰动到最终强非线性饱和态的途径。
An analytical theory is developed that describes asymptotically exactly the process of nonlinear saturation of the magnetorotational instability in a model problem employing a linear shear flow in a uniformly rotating channel. The theory shows that the instability saturates by modifying the shear responsible for it. The saturation process requires both viscous and Ohmic dissipation. The theory also describes the approach from small-amplitude perturbations to the final strongly nonlinear saturated state.