轴对称MHD流动的热力学
Thermodynamics of MHD flows with axial symmetry
摘要：
我们提出的战略的基础上极值化原则，在磁流体力学（MHD）的轴对称方程的情况下。在磁流体力学轴对称方程的约束下，利用最小能量原理研究了平衡形状。我们还提出了一种基于最大能量耗散原理的数值算法，以一致的方式计算平衡态。然后，我们发展了这种流动的统计力学，并恢复了相同的平衡态，给出了最小能量原理的理由。我们发现，波动服从高斯形状，我们之间的联系，在粗粒度尺度上的卡西米尔守恒和能量耗散的过程。
英文摘要：
We present strategies based upon extremization principles, in the case of the axisymmetric equations of magnetohydrodynamics (MHD). We study the equilibrium shape by using a minimum energy principle under the constraints of the MHD axisymmetric equations. We also propose a numerical algorithm based on a maximum energy dissipation principle to compute in a consistent way the equilibrium states. Then, we develop the statistical mechanics of such flows and recover the same equilibrium states giving a justification of the minimum energy principle. We find that fluctuations obey a Gaussian shape and we make the link between the conservation of the Casimirs on the coarse-grained scale and the process of energy dissipation.
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