“无碰撞电子热传导"与多方关系

本文从矩方程出发,用多方关系假设导出了Hollweg根据定性分析提出的“无碰撞电子热传导”公式,确定了该公式中的无量纲常数与多方指数之间的联系,进一步讨论了“无碰撞电子热传导”公式的适用条件

"Collisionless Electron Heat Conduction" and the Polytrope Law

The expression of the so called eollisionless electron heat conduction, which was proposed by Hollweg in 1976 based on the qualitative analysis, is deduced from the moment equations of the electron distribution function under the assumption of the existence of the polytrope law between the electron thermal pressure and electron density. Comparison of the expression deduced here with the Hollweg’s expression indicates that the unknown dimensionless factor in the letter is determined by the poly-trope index. The applicability of the "collisionless electron heat conduction" and the mechanism of the electron heat transport in the solar wind are discussed in detail.