论文标题
Tokamaks边缘的动荡扩散的模拟运动
Simulations Campaign of the Turbulent Diffusion at Tokamaks Edges
论文作者
论文摘要
对跨场传输的理解对于优化现代融合装置中磁性限制的特性至关重要。在这项工作中，使用二维简化模型来研究刮擦层区域中的湍流动力学。我们展示了基于简化的braginskii方程的数值模型如何能够描述斑点结构的形成和演变。我们通过改变等离子体的环境条件来研究这些复杂的动力学。我们发现，磁剪切和等离子体曲线对于运输的性质至关重要。通过遵循拉格朗日示踪剂，我们观察到径向传输的扩散瞬变，其长度比典型的斑点大小。这项工作与理解Tokamak设备边缘的湍流运输有关。
The understanding of cross-field transport is crucial in order to optimize the properties of magnetic confinement in modern fusion devices. In this work, a two-dimensional, simplified model is used to study the turbulent dynamics in the region of the scrape-off layer. We show how the numerical model, based on the reduced Braginskii equations, is able to describe the formation and the evolution over time of blobs structures. We study these complex dynamics by using both classical Eulerian analysis and the Lagrangian approach, by varying the ambient conditions of the plasma. We have found that both the magnetic shear and the plasma profiles are crucial for the properties of the transport. By following Lagrangian tracers, we observed diffusive transients for the radial transport, at lengthscales larger than the typical blob size. This work is relevant for the comprehension of the turbulent transport at the edges of tokamak devices.
