Fluid Modelling of DC Argon Microplasmas: Effects of the Electron Transport Description
Fluid Modelling of DC Argon Microplasmas: Effects of the Electron Transport Description
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DOI：
10.1007/s11090-019-09994-5
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发表时间：
2019-07-01
影响因子：
3.6
通讯作者：
Uhrlandt, D.
中科院分区：
文献类型：
--
作者：
Baeva, M.;Loffhagen, D.;Uhrlandt, D.
本文综述了常压氩气中电子输运性质描述对直流微等离子体特性的影响。提出了一个空间一维模型，该模型求解了整个电极间区域内电子和重粒子能量的连续性和守恒方程、耦合阴极传热的自一致电场泊松方程和电流密度调节的外部电路。该模型适用于电极间隙为400 μ m的单一装置，用于三种情况，特别是电子粒子和能量输运的漂移-扩散公式。结果涵盖了从正常辉光到异常辉光再到电弧放电的放电状态。他们表明，即使在相似的放电电压下，等离子体的性质（粒子密度、电子和重粒子的温度）也会根据电子传递的描述而有所不同。
The paper gives an overview of the influence of the description of the electron transport properties on the characteristics of a DC microplasma in argon at atmospheric pressure. A spatially one-dimensional model is presented which solves the equations for continuity and conservation of energy of electrons and heavy particles in the entire inter-electrode region, the Poisson equation for the self-consistent electric field coupled with the heat transfer in the cathode and an external electrical circuit for the regulation of the current density. The model is applied to a single setup with an inter-electrode gap of 400 mu m for three cases that differ in particular in the drift-diffusion formulation of the transport of electron particles and energy. The results obtained cover discharge regimes from normal glow through abnormal glow to arc discharge. They show that even at similar discharge voltage the plasma properties (particle densities, temperatures of electrons and heavy particles) can differ in the plasma depending on the description of the electron transport.