论文标题
非平面离子声音亚音速冲击波在耗散电子-ION-PCD等离子体中
Nonplanar ion-acoustic subsonic shock waves in dissipative electron-ion-pcd plasmas
论文作者
论文摘要
考虑在空间和实验室等离子体中观察到耗散性电子-ION-PCD（带正电荷的灰尘）血浆。通过使用还原性扰动方法得出改良的汉堡方程，研究了这种介质中非平面圆柱和球形离子 - 声音冲击波的基本特征。发现固定的PCD物种降低了离子声波的相位速度，因此由于离子物种的运动粘度（充当耗散的来源）引起的亚音速冲击波。据观察，圆柱和球形亚电动冲击波随时间的显着发展，并且球形休克结构的时间演变要比圆柱形的速度更快。讨论了工作结果对太空和实验室等离子体的含义。
The dissipative electron-ion-pcd (positively charged dust) plasma, which is observed in both space and laboratory plasmas, is considered. The basic features of nonplanar cylindrical and spherical ion-acoustic subsonic shock waves in such a medium are investigated by deriving a modified Burgers equation using the reductive perturbation method. It is found that the stationary pcd species reduces the phase speed of the ion-acoustic waves, and consequently supports the subsonic shock waves due to the kinematic viscosity (acting as a source of dissipation) of the ion species. It is observed that the cylindrical and spherical subsonic shock waves evolve with time very significantly, and that the time evolution of the spherical shock structures is faster than that of the cylindrical ones. The implications of the results of the work to space and laboratory plasmas are discussed.
