Global 3D two-fluid simulations of the tokamak edge region: Turbulence, transport, profile evolution, and spontaneous E × B rotation
Global 3D two-fluid simulations of the tokamak edge region: Turbulence, transport, profile evolution, and spontaneous E × B rotation
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托卡马克边缘区域的全局 3D 二流体模拟：湍流、传输、剖面演化和自发 E × B 旋转
DOI：
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发表时间：
2017
期刊：
影响因子：
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通讯作者：
B. Rogers
中科院分区：
文献类型：
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作者：
B. Zhu;M. Francisquez;B. Rogers
我们提出了 L 模式边缘托卡马克等离子体湍流和轮廓演化的全局双流体模拟，包括闭合场线和刮落层。我们考虑具有现实的 Alcator C-Mod 内壁有限放电参数的移圆磁配置。模拟中湍流的主要驱动因素是阻力气球模式。在所有情况下，我们都观察到闭合通量区域中电子抗磁漂移方向的自发 E × B 旋转。我们根据稳态离子连续性关系 ∇·n v → i ≈ 0 对此进行解释。我们发现，封闭通量区域中的 E × B 旋转大部分抵消了离子抗磁漂移，因为由于平行离子流，在较低温度下接近并超过类似 H 模式的状态并超过它 2 倍或更多。
We present global two-fluid simulations of L-mode edge tokamak plasma turbulence and profile evolution including both closed field lines and the scrape-off-layer. We consider a shifted-circle magnetic configuration with realistic Alcator C-Mod inner wall limited discharge parameters. The dominant driver of turbulence in the simulations is the resistive ballooning mode. We observe spontaneous E × B rotation in the electron diamagnetic drift direction in the closed flux region in all cases. We explain this based on the steady state ion continuity relation ∇ · n v → i ≈ 0 . We find that the E × B rotation in the closed flux region mostly cancels the ion diamagnetic drift as H-mode-like regimes are approached and exceeds it by a factor of 2 or more at lower temperatures due to parallel ion flows.
影响因子：
2.2
作者：
B. Dudson;X. Q. Xu;M. V. Umansky;H. Wilson;P. Snyder
通讯作者：
B. Dudson;X. Q. Xu;M. V. Umansky;H. Wilson;P. Snyder