Scale separation between electron and ion thermal transport.
Scale separation between electron and ion thermal transport.
复制标题
DOI：
10.1103/physrevlett.100.185002
复制
发表时间：
2008-05
影响因子：
8.6
通讯作者：
T. Görler;F. Jenko
中科院分区：
文献类型：
--
作者：
T. Görler;F. Jenko
同时驱动的电子温度梯度模式，捕获的电子模式，和离子温度梯度模式的微湍流的非线性陀螺动力学模拟，涵盖电子和离子的时空尺度自洽。据发现，对于现实的离子热（和粒子）通量水平，并在不稳定的电子温度梯度模式的存在下，有倾向于电子和离子的热传输之间的尺度分离。与后者相反，前者可能表现出大量甚至占主导地位的高波数贡献。
Nonlinear gyrokinetic simulations of microturbulence simultaneously driven by electron temperature gradient modes, trapped electron modes, and ion temperature gradient modes are presented, covering both electron and ion spatiotemporal scales self-consistently. It is found that, for realistic ion heat (and particle) flux levels and in the presence of unstable electron temperature gradient modes, there tends to be a scale separation between electron and ion thermal transport. In contrast to the latter, the former may exhibit substantial or even dominant high-wave-number contributions.