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arXiv 0901.2037physics.plasm-ph
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离子温度梯度模式下纬向流生成的多尺度分析模式比较turbulence

Comparison of multi-scale analysis models applied to zonal flow generation in ion-temperature-gradient mode turbulence

J. Anderson, Y. Kishimoto

摘要:

在过去的几年里,对多尺度相互作用问题的理解有了显着增加。然而,目前存在一系列不同的分析模型来研究多尺度相互作用,并且几乎没有对这些模型进行任何具体的比较。在这项工作中,两种不同的模式产生的纬向流离子温度梯度(ITG)背景湍流进行了讨论和比较。所用的方法是相干模耦合模型和波动方程模型(WKE)。结果表明,这两个模型给出定性相同的结果,即使在(WKE)的方法中使用的频谱差异的假设。

英文摘要:

During the past years the understanding of the multi-scale interaction problems have increased significantly. However, at present there exists a range of different analytical models for investigating multi-scale interactions and hardly any specific comparisons have been performed among these models. In this work, two different models for the generation of zonal flows from ion-temperature-gradient (ITG) background turbulence are discussed and compared. The methods used is the coherent mode coupling model and the wave kinetic equation model (WKE). It is shown that the two models give qualitatively the same results even though the assumption on the spectral difference is used in the (WKE) approach.

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