期刊
PHYSICS OF PLASMAS
卷 25, 期 12, 页码 -出版社
AIP Publishing
DOI: 10.1063/1.5055750
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资金
- Air Force Office of Scientific Research [FA9550-18-1-0090]
This paper presents a non-oscillatory quasineutral plasma model, in which the electric field in the ion momentum equation employs the electron drift-diffusion formulation. Due to the quasineutral assumption, the electron pressure is directly coupled with the ion pressure in the inviscid flux of the ion momentum equation, which is solved using a finite-volume method with nonlinear limiting. The electron-pressure coupled method eliminates the grid-scale numerical oscillations that occur particularly near the stagnation point (the ion bulk velocity is close to zero) of a cross-field discharge plasma when using an uncoupled method. Additionally, such numerical oscillations are also observed when using a quasineutral hybrid model where a grid-or particle-based kinetic approach is employed for ions. The importance of coupling the electron pressure and ion momentum in a quasineutral plasma model is discussed. Published by AIP Publishing.
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