日珥中浮力羽流的数值模拟
Simulations of Buoyant Plumes in Solar Prominences
摘要：
对太阳黑子的观测揭示了它们内部复杂的动态流场。静止湍流内的流场的特征是在薄层中分别下降和上升的长“线”和暗“泡”。活动日珥的流场表现出更多的螺旋运动，沿日珥轴向运动。我们探索这两个可能的动力学的帮助下，2.5D MHD模拟。我们的模型，可压缩等离子体具有密度和温度梯度，并在磁场的配置，模仿那些日珥。我们提出了各种配置的结果，并讨论所产生的动态的非线性行为。
英文摘要：
Observations of solar prominences reveal a complex, dynamic flow field within them. The flow field within quiescent prominences is characterized by long ``threads'' and dark ``bubbles'' that fall and rise (respectively) in a thin sheet. The flow field in active prominences display more helical motions that travel along the axis of the prominence. We explore the possible dynamics of both of these with the aid of 2.5D MHD simulations. Our model, compressible plasma possesses density and temperature gradients and resides in magnetic field configurations that mimc those of a solar prominence. We present results of various configurations and discuss the nonlinear behavior of the resulting dynamics.
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