A plasma jet at atmospheric pressure using a dielectric barrier discharge (DBD) can be very useful in the biomedical field. In this article, a numerical simulation of such plasma jet operating in argon gas and launched in the open air was developed using COMSOL Multiphysics software. Three coupled models are considered in this study. A hydrodynamic investigation is conducted and the dilution of argon in air is considered an initial value in the plasma model. An electrostatic study is developed in order to preview the initial electric field. Finally, a plasma study is carried out and discussed in terms of electron density, electric field distribution, and plasma length. This study is validated by comparing the results to those measured in a similar system in the literature. The results are in good agreement with the literature and correspond to the physics of the plasma jet.

中文翻译：

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低温氩等离子体射流的数值模拟

在大气压力下使用介电势垒放电（DBD）的等离子流在生物医学领域中非常有用。在本文中，使用COMSOL Multiphysics软件开发了这种在氩气中操作并在户外发射的等离子流的数值模拟。本研究考虑了三种耦合模型。进行了流体动力学研究，并且在等离子体模型中将空气中氩气的稀释视为初始值。为了预见初始电场，开展了静电研究。最后，进行了等离子体研究，并就电子密度，电场分布和等离子体长度进行了讨论。通过将结果与文献中类似系统中测得的结果进行比较，可以验证这项研究的有效性。