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首页> 外文期刊>Contributions to Plasma Physics >On the Effect of Electron Temperature Fluctuations on Turbulent Heat Transport in the Edge Plasma of Tokamaks
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On the Effect of Electron Temperature Fluctuations on Turbulent Heat Transport in the Edge Plasma of Tokamaks

机译：电子温度波动对托卡马克边缘等离子体中湍流传热的影响

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In this paper we study the impact of electron temperature fluctuations in a two-dimensional turbulent model. This modification adds a second linear instability, known as sheath-driven conducting-wall instability, with respect to the previous isothermal model only driven by the interchange instability. Non-linear simulations, backed up by the linear analysis, show that the additional mechanism can change drastically the dynamics of turbulence (scales, density-potential correlation, and statistical momentum). Moreover, its importance relatively to the interchange instability should be more significant in the private flux region than in the main scrape of layer. Its effect on heat transport is also investigated for different regimes of parameters, results show that both instabilities are at play in the heat transport. Finally, the sheath neagtive resistance instability could be responsible for the existence of corrugated heat flux profiles in the scrape-off layer leading to a multiple decay length. ((c) 2016 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim)
机译：在本文中，我们研究了二维湍流模型中电子温度波动的影响。相对于仅由交换不稳定性驱动的以前的等温模型，此修改增加了第二个线性不稳定性，称为护套驱动的传导壁不稳定性。由线性分析支持的非线性模拟表明，附加机制可以极大地改变湍流的动力学（尺度，密度-势相关性和统计动量）。而且，相对于交换不稳定性，其重要性在专用通量区域中要比在主要层刮除中更为重要。还针对不同的参数制度研究了其对热传递的影响，结果表明两种不稳定性都在热传递中起作用。最后，护套负电阻的不稳定性可能是刮除层中存在波纹热通量分布的原因，从而导致多个衰减长度。 （（c）2016 WILEY-VCH Verlag GmbH＆Co.KGaA，Weinheim）

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