| 磁流体力学流动的特性与日珥中的一些物理过程 |
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| 引用本文： | 孙凯.磁流体力学流动的特性与日珥中的一些物理过程[J].中国天文和天体物理学报,2000,20(3). |
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| 作者姓名： | 孙凯 |
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| 作者单位： | 中国科学院-北京大学联合北京天体物理研究中心!北京100871北京大学地球物理系北京100871 |
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| 基金项目： | 国家自然科学基金!49391400 |
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| 摘 要： | 应用并改进了由Chandrasekhar提出的一个变换，以改变磁流体力学方程组的形式．将动量守恒方程变成一个物理变量的二次方程．研究了磁流体力学流动演化的非线性性质，特别注意突变过程．本文导出的理论结果表明，磁流体力学流动能被分成一些分支，虽然在分支之间的跳跃（突变）可有大一些和小一些之分．进行了关于太阳日珥的数值试验；它们进一步直接表明理论结果的正确性．而且，虽然三个守恒定律所涉及的数量之间可以相差多个数量级，但它们在跳跃中所起的作用均不可被低估．
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| 关 键 词： | 磁流体力学 太阳活动 |
Properties of Magnetohydrodynamic Flows and Some Physical Processes in the Solar Prominences |
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| SUN Kai.Properties of Magnetohydrodynamic Flows and Some Physical Processes in the Solar Prominences[J].Chinese Journal of Astronomy and Astrophysics,2000,20(3). |
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| Authors: | SUN Kai |
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| Abstract: | A transform introduced by Chandrasekhar is used and generalized to change the form of the system of magnet ohydro dy namic (M H D ) equat ions. The equ at io n of conservation of momentum is changed into a quadratic equation of a certain physical quantity. The nonlinearity in the evolution of the MHD flow is investigated with special emphasis on sudden changes. Our results show that an MHD flow can be divided into stages separated by more or less sudden changes. A numerical test applied to solar prominences ftirther shows the correctness of the theoretical results. Although the quantities involued in the tliree conservation laws may differ by many orders of magnitude from each other, all three must be included when considering the jumps. |
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| Keywords: | MHD solar activity |
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