Modelling the solar transition region using an adaptive conduction method
Modelling the solar transition region using an adaptive conduction method
复制标题
使用自适应传导方法对太阳过渡区域进行建模
DOI：
10.1051/0004-6361/201936979
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发表时间：
2020
影响因子：
6.5
通讯作者：
A. C. Vaseekar
中科院分区：
文献类型：
--
作者：
C. Johnston;P. Cargill;A. Hood;I. Moortel;Stephen J. Bradshaw;A. C. Vaseekar
使用自适应传导 (TRAC) 方法对太阳过渡区域进行建模，可以快速、准确地求解场对准的流体动力学方程，捕获日冕经历脉冲加热时日冕和过渡区域之间的焓交换。 TRAC 方法消除了过渡区域中高分辨率数值网格的需要以及数值稳定性所需的相当短的时间步长。当采用粗空间分辨率时（通常在多维磁流体动力学代码中实现），峰值密度的误差小于 5%，并且计算时间比完全解析的场对准模型快三个数量级。本文提供了进一步的示例，证明该方法在一系列加热事件（包括脉冲和准稳态足点加热）中的多功能性和鲁棒性。还提出了 TRAC 方法的详细分析评估，表明该方法适用于脉冲加热事件的所有阶段，因为 (i) 总辐射损失和 (ii) 在过渡区域积分时的总加热在该方法的扩展修改下在所有温度下均得到保留。数值模拟的结果补充了这一结论。
Modelling the solar Transition Region with the use of an Adaptive Conduction (TRAC) method permits fast and accurate numerical solutions of the field-aligned hydrodynamic equations, capturing the enthalpy exchange between the corona and transition region, when the corona undergoes impulsive heating. The TRAC method eliminates the need for highly resolved numerical grids in the transition region and the commensurate very short time steps that are required for numerical stability. When employed with coarse spatial resolutions, typically achieved in multi-dimensional magnetohydrodynamic codes, the errors at peak density are less than 5% and the computation time is three orders of magnitude faster than fully resolved field-aligned models. This paper presents further examples that demonstrate the versatility and robustness of the method over a range of heating events, including impulsive and quasi-steady footpoint heating. A detailed analytical assessment of the TRAC method is also presented, showing that the approach works through all phases of an impulsive heating event because (i) the total radiative losses and (ii) the total heating when integrated over the transition region are both preserved at all temperatures under the broadening modifications of the method. The results from the numerical simulations complement this conclusion.
影响因子：
2.2
作者：
P. Antolin
通讯作者：
P. Antolin
影响因子：
6.5
作者：
Botha, G. J. J.;Arber, T. D.;Hood, A. W.
通讯作者：
Hood, A. W.
日冕中 II 型骨针的影响：模拟和综合观测值
DOI：
10.3847/1538-4357/aac2ca
发表时间：
2018
期刊：
The Astrophysical Journal
影响因子：
--
作者：
Martínez-Sykora, Juan;Pontieu, Bart De;Moortel, Ineke De;Hansteen, Viggo H.;Carlsson, Mats
通讯作者：
Carlsson, Mats