Role of ion diamagnetic effects in the generation of large scale flows in toroidal ion temperature gradient mode turbulence
Role of ion diamagnetic effects in the generation of large scale flows in toroidal ion temperature gradient mode turbulence
复制标题
离子反磁效应在环形离子温度梯度模式湍流中产生大尺度流中的作用
DOI：
10.1063/1.1289514
复制
发表时间：
2000
影响因子：
2.2
通讯作者：
M. Medvedev
中科院分区：
文献类型：
--
作者：
A. Smolyakov;P. Diamond;M. Medvedev
本文研究了环形离子温度梯度湍流中大尺度流场的二次不稳定性。它示出的抗磁效应（有限的压力波动），如那些环形离子温度梯度模式，显着增加总雷诺力。通常，压力波动相对于静电势具有有限的相移。结果表明，这两个部分（同相和异相）有助于反磁雷诺应力张量。此外，压力波动的异相分量是异常能量通量的原因。它示出在这里，一个特定的贡献的异相分量的雷诺应力张量，使我们能够解耦带状流动力学的离子压力分布的缓慢演变。本文导出了环形离子温度梯度湍流中纬向流和流注不稳定性的一般方程，并确定了增长率。
The secondary instability of large scale flows, such as zonal flows and streamers, in toroidal ion temperature gradient turbulence is investigated. It is shown that diamagnetic effects (finite pressure fluctuations), such as those for toroidal ion temperature gradient modes, significantly increase the total Reynolds force. In general, pressure fluctuations have a finite phase shift relative to the electrostatic potential. It is shown that both parts (in-phase and out-of-phase) contribute to the diamagnetic Reynolds stress tensor. Also, the out-of-phase component of the pressure fluctuations is responsible for anomalous energy flux. It is shown here, that a specific contribution of the out-of-phase component to the Reynolds stress tensor allows us to decouple zonal flow dynamics from slow evolution of the ion pressure profile. General equations for the zonal flow and streamer instabilities in toroidal ion temperature gradient turbulence are derived and the growth rates are determined.
影响因子：
3.3
作者：
A. Gibson;T. Sekiguchi;K. Lackner;S. Bodner;R. Hancox
通讯作者：
A. Gibson;T. Sekiguchi;K. Lackner;S. Bodner;R. Hancox