A Nearly Incompressible Turbulence-Driven Solar Wind Model

A Nearly Incompressible Turbulence-Driven Solar Wind Model
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几乎不可压缩的湍流驱动的太阳风模型

DOI:
10.1088/1742-6596/1332/1/012001
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发表时间:
2019
期刊:
Journal of Physics: Conference Series
影响因子:
--
通讯作者:
Zhao, L.-L
Zhao, L.-L
中科院分区:
--
文献类型:
--
作者:
Adhikari, L;Zank, G P;Zhao, L.-L

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我们通过耦合最近发展的几乎不可压缩的磁流体动力湍流输运模型方程和一维流体动力太阳风方程,建立了一维稳态湍流驱动的太阳风模型。由光球“磁毯”的出现所产生的多数分量准二维湍流和少数分量板湍流的耗散是加热日冕等离子体的原因。我们求解了从日冕底部到20太阳半径的准二维和平板湍流耦合输运方程和太阳风方程。结果表明:(1)日冕基底附近日冕温度升高至~ 2.5 × 106K;Ii)太阳风在几个太阳半径内迅速加速;Iii)随着距离的增加,湍流能量密度减小,相关长度增加;iv)日冕基部平衡的准二维湍流变得不平衡,非平衡板状湍流随着距离的增加变得更加不平衡;v)在日冕基部附近,归一化的准二维和板状残余能量变为正能量,随着距离的增加,两者都变为负能量。
We develop a 1D steady-state turbulence driven-solar wind model by coupling recently developed nearly incompressible magnetohydrodynamic turbulence transport model equations and 1D hydrodynamic solar wind equations. The dissipation of majority component quasi-2D turbulence and minority slab turbulence generated by the emergence of the “magnetic carpet” from the photosphere is responsible for heating the coronal plasma. We solve the coupled quasi-2D and slab turbulence transport equations and the solar wind equations from the base of the solar corona until 20 solar radii. We find that i) the coronal temperature increases to ~ 2.5 × 106K near the base of the solar corona; ii) the solar wind accelerates rapidly within a few solar radii; iii) turbulence energy densities decrease and correlation lengths increase with distance; iv) balanced quasi-2D turbulence at the coronal base becomes imbalanced, and imbalanced slab turbulence becomes more imbalanced with distance, and v) the normalized quasi-2D and slab residual energy becomes positive near the coronal base, and both energies become negative with increasing distance.
DOI: 10.1088/0004-637x/767/2/125
发表时间: 2013-03
期刊: The Astrophysical Journal
影响因子: --
作者:
S. Cranmer;A. van Ballegooijen;L. N. Woolsey
通讯作者: S. Cranmer;A. van Ballegooijen;L. N. Woolsey
开放场线区域中波驱动的湍流日冕加热:非线性唯象模型
DOI: --
发表时间: 2001
期刊:
影响因子: --
作者:
P. Dmitruk;L. Milano;W. Matthaeus
通讯作者: W. Matthaeus
DOI: 10.3847/1538-4357/aa6f5d
发表时间: 2017-06-01
影响因子: 4.9
作者:
Adhikari, L.;Zank, G. P.;Telloni, D.
通讯作者: Telloni, D.
DOI: 10.1088/0004-637x/773/2/167
发表时间: 2013
期刊: The Astrophysical Journal
影响因子: --
作者:
Abramenko V
通讯作者: Abramenko V