To study the dynamic characteristics of filamentary structure during the edge-localized mode (ELM) burst on the experimental advanced superconducting tokamak, the BOUT++ six-field two-fluid model is used to simulate the temporal and spatial evolutions of the ELM filaments. In the peak gradient region at the outer mid-plane, the radial speed of filaments is changed frequently and varied from 0.11 km/s to 0.79 km/s, and the poloidal speed oscillates in the range of 0.61–0.85 km/s. The width of the ELM filaments is increased from 7.76 mm to 26.7 mm and grows rapidly to 41.99 mm from t = 0.2717 ms to 0.2831 ms after the start of the burst. After that, the width decreases gradually and stabilizes at 25–30 mm when it comes to the saturation phase. Further research indicates that the filament propagation speed is increased during their outward movement. The width gradually decreases when the filaments move outward, and it is proportional to electron temperature (T_e) perturbation. All the results are consistent with the experimental data presented by Chen et al., IEEE Trans. Plasma Sci. 47, 799 (2019).

中文翻译：

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使用BOUT ++在EAST托卡马克上模拟ELM细丝的动态特性

为了研究先进的实验超导托卡马克在边缘定位模式（ELM）爆发期间丝状结构的动态特性，使用BOUT ++六场两流体模型来模拟ELM丝的时空演化。在外中平面的峰值梯度区域，细丝的径向速度经常变化，从0.11 km / s变化到0.79 km / s，而极点速度在0.61-0.85 km / s的范围内振荡。ELM细丝的宽度从7.76毫米增加到26.7毫米，并从t迅速增长到41.99毫米=突发开始后= 0.2717毫秒至0.2831毫秒。之后，宽度逐渐减小并在达到饱和阶段时稳定在25–30 mm。进一步的研究表明，细丝的传播速度在其向外移动过程中增加了。当细丝向外移动时，宽度逐渐减小，并且与电子温度（T _e）扰动成比例。所有结果均与Chen等人提供的实验数据一致。，IEEE Trans。等离子科学 47，799（2019）。