SMOOTH PLASMA SHEATH TRANSITION IN A HYDRODYNAMIC MODEL

被引：185

作者：

GODYAK, VA ^{[1
]}

STERNBERG, N ^{[1
]}

机构：

[1] CLARK UNIV,DEPT MATH & COMP SCI,WORCESTER,MA 01610

来源：

IEEE TRANSACTIONS ON PLASMA SCIENCE | 1990年 / 18卷 / 01期

关键词：

Electric Fields - Hydrodynamics - Mathematical Models - Mathematical Techniques--Boundary Value Problems;

D O I：

10.1109/27.45519

中图分类号：

O35 [流体力学]; O53 [等离子体物理学];

学科分类号：

070204 ; 080103 ; 080704 ;

摘要：

In the hydrodynamic plasma and sheath models, when the two models are treated separately the use of Bohm's criterion to obtain boundary conditions at the plasma-sheath interface leads to singularities and discontinuities in some physical quantities. This problem can be overcome by using an appropriate boundary condition; namely, by specifying a particular finite value of the electric field at the plasma-sheath interface. Using such a boundary condition and arbitrary collision parameters, sheath characteristics are then calculated continuously from the collisionless to the collisional sheath. When applied to the plasma model, this new boundary condition takes into account the space-charge effect on the behavior of the plasma at its boundary. © 1990 IEEE

引用

页码：159 / 168

页数：10

共 25 条

[1] COLLISION-DOMINATED POSITIVE COLUMN OF A WEAKLY IONIZED GAS [J].