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首页> 外文期刊>Journal of Physics, D. Applied Physics: A Europhysics Journal >Numerical modelling of atmospheric pressure gas discharges leading to plasma production
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Numerical modelling of atmospheric pressure gas discharges leading to plasma production

机译：导致等离子体产生的大气压气体排放的数值模型

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In this paper, we give a detailed review of recent work carried out on the numerical characterization of non-thermal gas discharge plasmas in air at atmospheric pressure. First, we briefly describe the theory of discharge development for dielectric barrier discharges. which is central to the production of non-equilibrium plasma, and we present a hydrodynamic model to approximate the evolution of charge densities. The model consists of the continuity equations for electrons, positive and negative ions coupled to Poisson's equation for the electric field. We then describe features of the finite element flux corrected transport algorithm, which has been developed to specifically aim for accuracy (no spurious diffusion or oscillations), efficiency (through the use of unstructured grids) and ease of extension to complex 3D geometries in the framework of the hydrodynamic model in gas discharges. We summarize the numerical work done by other authors who have applied different methods to various models and then we present highlights of our own work, which includes code validation, comparisons with existing results and modelling of radio frequency systems, dc C, discharges, secondary effects Such as photoionization and plasma production in the presence of dielectrics. The extension of the code to 3D for more realistic simulations is demonstrated together with the adaptive meshing technique, which serves to achieve higher efficiency. Finally, we illustrate the versatility of our scheme by using it to simulate the transition from non-thermal to thermal discharges. We conclude that numerical modelling and, in particular, the extension to 3D can be used to shed new light on the processes involved with the production and control of atmospheric plasma, which plays an important role in a host of emerging technologies.
机译：在本文中，我们将详细回顾近期在大气中空气中非热气体放电等离子体的数值表征方面所做的工作。首先，我们简要描述介电势垒放电的放电发展理论。这是产生非平衡等离子体的关键，我们提出了一种流体动力学模型来近似电荷密度的变化。该模型由电子连续性方程，正负离子和电场的泊松方程组成。然后，我们描述有限元通量校正的传输算法的功能，该算法的开发目的是专门针对精度（无杂散扩散或振荡），效率（通过使用非结构化网格）以及易于扩展到框架中复杂的3D几何形状气体排放中的流体动力学模型我们总结了将不同方法应用于各种模型的其他作者所做的数值工作，然后介绍了我们自己的工作重点，包括代码验证，与现有结果的比较以及对射频系统，DC C，放电，二次效应的建模例如在电介质存在下的光电离和等离子体产生。结合自适应网格技术展示了将代码扩展到3D以进行更逼真的仿真的过程，该技术可实现更高的效率。最后，我们通过使用它来模拟从非热放电到热放电的过渡，说明了该方案的多功能性。我们得出的结论是，数值建模（尤其是3D扩展）可用于阐明与大气等离子体的生产和控制有关的过程，这在许多新兴技术中起着重要作用。

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