2d simulation of the ac argon plasma jet at low temperature using COMSOL Multiphysics software

In this study, we simulated a two-dimensional physical model of the low temperature plasma jet based on a dielectric barrier discharge, so the mathematical model is solved by the finite element method (FEM) using the commercial FEM solver COMSOL Multiphysics, for a unique geometry in which argon gas is used with an AC power supply, for a voltage of 5 KV amplitude, a pressure of 1 Torr and a frequency of 17 KHz. This made it possible to study the different parameters of the plasma jet, such as electron density, electron temperature distribution, electric field distribution and other characteristics in the reaction chamber. The results show that the maximum electron density is generated at the orifice of the plasma jet at low temperature. The maximum electric field of 1.28 $\times$10$^7$ V/m and the maximum electron density of 3.5 $\times$10$^{17}$(1/m$^3$) are observed. The maximum electric field of 1.28$\times$10$^{7}$ V/m near the tube surface causes ionization in the plasma channel to propagate the plasma plume. The simulation made it possible to follow the development of the discharge, the formation of the ionization wave and the surface discharges towards the exit of the tube over time.