A Transport Study for Resistive Interchange Mode Turbulence Based on a Renormalized Theory
A Transport Study for Resistive Interchange Mode Turbulence Based on a Renormalized Theory
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基于重正化理论的阻性交换模式湍流输运研究
DOI：
10.1143/jpsj.57.2010
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发表时间：
1988
影响因子：
1.7
通讯作者：
M. Wakatani
中科院分区：
文献类型：
--
作者：
H. Sugama;M. Wakatani
提出了流体型湍流重整化理论的新表述，以获得波数谱和湍流扩散率。讨论了电阻交换模式湍流的应用。使用简化的 MHD 方程得出的湍流扩散率与基于混合长度参数或尺度不变性的评估一致，但系数约为 4。通过重正化理论分析了基于有限拉莫尔半径磁流体动力学（FLR-MHD）的扩展模型，包括电阻漂移波和电阻交换模式之间的耦合。扩散率取决于相位差以及密度涨落和电势涨落之间的相对大小，并且密度梯度的作用比简化的MHD结果更加显着。然而，扩展模型的波数谱变化不大。
A new formulation of renormalized theory for fluid-type turbulence to obtain wavenumber spectrum and turbulent diffusivity is presented. An application to the resistive interchange mode turbulence is discussed. The turbulent diffusivity using the reduced MHD equations agrees with evaluations based on the mixing length argument or the scale invariance except a coefficient of about four. An extended model based on finite Larmor radius magnetohydrodynamics (FLR-MHD) including coupling between the resistive drift wave and the resistive interchange mode is analyzed by the renormalized theory. The diffusivity depends on the phase difference and the relative magnitude between the density fluctuation and the potential fluctuation, and role of density gradient becomes more significant than the reduced MHD result. However, the wavenumber spectrum does not change much by the extended model.