Abstract
A scientific understanding of the high-intensity free-burning arc is critical for improving the industrial applications of atmospheric plasma systems. However, it has not been easy to investigate the characteristics of this arc theoretically and experimentally due to several problems such as the interactions of electric, magnetic, fluid dynamic, and thermal effects. Furthermore, fluid dynamic effects induced by the arc itself are important when the cathode jet impinges on the anode, resulting in the well-known bell shape of free-burning arcs due to the flow stagnation, and when a metallic probe is inserted to the flowing thermal plasma for the diagnosis. In this study, computer simulations are presented for an entire free-burning arc with a metallic probe and for two different distances between the cathode tip and the anode surface.
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