摘要
从只考虑粘滞效应的非理想磁流体方程组出发,先应用半解析方法进行公式推导,然后数值计算了几种非均匀等离子体压强时,圆柱等离子体轴向扰动磁场随半径和粘度的演化规律。数值模拟结果表明:轴向扰动磁场在等离子体轴线位置处的值为零,而且这个值不受等离子体粘度,波数以及压强的影响。当等离子体压强一定时,轴向扰动磁场的极大值随着粘度的增加而增大。当粘度大到一定程度时,轴向扰动磁场在轴线和壁之间出现多个极大值和极小值,这表明了等离子体粘度对轴向扰动磁场的影响十分明显。
The interaction of an axial disturbing magnetic field and a viscous cylindrical-plasma was mathematically modeled,theoretically calculated in semi-analytical method,by deriving the approximated formula from non-ideal magneto-hydrodynamic equations involving viscosity,and numerically simulated. The influence of the plasma＇s properties; including the radius,viscosity,wave-number and pressure,on the radial distribution of the axial disturbing magnetic field was investigated. The simulated results show that the viscosity has a major impact. For example,as the viscosity increased at a given pressure,the maximum axial disturbing magnetic field increased; at a large enough viscosity,the magnetic field displayed the rippled radial profile,being zero at r = 0 and independent of viscosity,wave number and pressure of the plasma. Moreover,at a fixed viscosity,the highest axial disturbing magnetic field decreased with an increase of the plasma＇s pressure.
作者
代玉杰
王学慧
Dai Yujie;Wang Xuehui(College of Sciences,Liaoning Shihua University,Fushun 113001,China)
出处
《真空科学与技术学报》
EI
CAS
CSCD
北大核心
2018年第10期883-886,共4页
Chinese Journal of Vacuum Science and Technology
关键词
轴向扰动磁场
非均匀压强
粘度
Axial disturbed magnetic field
Inhomogeneous pressure
Viscosity
