Two-dimensional hybrid Monte Carlo–fluid modelling of dc glow discharges: Comparison with fluid models, reliability, and accuracy

Abstract

Two-dimensional hybrid Monte Carlo-fluid numerical code is developed and applied to model the dc glow discharge. The model is based on the separation of electrons into two parts: the low energetic (slow) and high energetic (fast) electron groups. Ions and slow electrons are described within the fluid model using the drift-diffusion approximation for particle fluxes. Fast electrons, represented by suitable number of super particles emitted from the cathode, are responsible for ionization processes in the discharge volume, which are simulated by the Monte Carlo collision method. Electrostatic field is obtained from the solution of Poisson equation. The test calculations were carried out for an argon plasma. Main properties of the glow discharge are considered. Current-voltage curves, electric field reversal phenomenon, and the vortex current formation are developed and discussed. The results are compared to those obtained from the simple and extended fluid models. Contrary to reports in the literature, the analysis does not reveal significant advantages of existing hybrid methods over the extended fluid model. V C 2015 AIP Publishing LLC.

2-D Modeling of Orificed Hollow Cathodes of Stationary Plasma Thrusters SPT-100

“…In this case, electron heating source in the plasma becomes nonlocal, because the effect of heating caused by the heat flux from the cathode layer, where main Joule heating occurs, is taken into account properly. Analysis of the calculation results showed [15]- [24] that the model describes adequately basic properties of glow discharge, reproduces correctly currentvoltage characteristics (CVCs), and specific discharge modes occurring along the CVC (including normal mode and formation of a normal current density in 2-D simulations) as well as 2-D spatial profiles of such discharge parameters as charged particle densities, electron temperature, electric potential, and electric field.…”

“…Analysis of different simulation approaches, conducted in [15], indicated that extended fluid model is the most developed and established model and that it was successfully tested on various gas discharges. This model was proposed in [16] and [17] and developed in [18]- [24].…”

Влияние Температуры На Ионизационный Коэффициент И Напряжение Зажигания Таунсендовского Разряда В Смеси Аргона С Парами Ртути

“…Для моделирования движения электронов в настоящей работе применяется методи-ка, основанная на использовании метода Монте-Кар-ло [20][21][22]. Учитывается упругое рассеяние электронов на атомах компонент смеси, а также возбуждение и ионизация ими невозбужденных и метастабильных ато-мов с использованием зависимостей сечений этих про-цессов от скорости электрона, приведенных в [23][24][25].…”

2-D Extended Fluid Model of Applied-Field Magnetoplasmadynamic Thruster With Solid and Hollow Cathodes

“…In [31], a thorough analysis of existing simulation approaches for gas discharge simulation was performed. It was indicated that extended fluid model developed in [32] and [33] is the most consistent model and that it has been successfully tested on various gas discharges [34]- [36], [40].…”