Electromagnetic theory of turbulent acceleration of parallel flow and momentum conservation
Electromagnetic theory of turbulent acceleration of parallel flow and momentum conservation
复制标题
平行流湍流加速电磁理论与动量守恒
DOI：
10.1063/1.4974040
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发表时间：
2017
影响因子：
2.2
通讯作者：
Wang Lu
中科院分区：
文献类型：
--
作者：
Peng Shuitao;Wang Lu
等离子体物理学中的内禀流动是一个长期存在的难题，因为很难理解它的起源而不与传统智慧中的动量守恒相矛盾。证明了电磁湍流加速作为内禀平行流产生的候选者，由沿总磁力线的压力梯度沿着驱动，并不与动量守恒相矛盾。对应于轴对称的守恒量是两种离子所携带的总回旋中心平行正则动量或包括离子回旋中心运动动量和电磁场动量的总回旋中心平行动量，而不是离子运动动量，甚至不是离子平行流。给出了包含离子粒子运动动量和电磁场动量的总平行动量守恒方程。
Intrinsic flow in plasma physics is a long-standing puzzle, since it is difficult to understand its origin without contradiction to momentum conservation in conventional wisdom. It is proved that the electromagnetic turbulent acceleration as a candidate for intrinsic parallel flow generation driven by pressure gradient along the total magnetic field line does not contradict the momentum conservation. The conserved quantity corresponding to axial symmetry is the total gyrocenter parallel canonical momentum carried by both species or the total gyrocenter parallel momentum including the ion gyrocenter kinematic momentum and electromagnetic fields momentum, but not the ion kinematic momentum, or even the ion parallel flow. A conservation equation of total parallel momentum including the ion particles' kinematic momentum and electromagnetic fields momentum is also presented.