What is it about?

A model has been developed that combines a model of an equilibrium direct current arc plasma in atmospheric pressure argon with the assembly of a cathode made of tungsten and the boundary layer. A bidirectional coupling has been realized that allows us to consider a variable voltage drop across the boundary layer for different positions on the cathode.

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Why is it important?

Results are obtained for arc currents between 10 and 150A in the cases of both a unidirectional and a bidirectional coupling. They show differences in the distributions of the temperature and the normal current density on the cathode surface and the radial and axial distributions of the plasma temperature.

Perspectives

Implementation of the bidirectional coupling in arc plasma devices such as plasma spray torches.

Margarita Baeva
leibniz Institute for Plasma Science and Technology, Greifswald, Germany

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This page is a summary of: Effect of a bidirectional coupling of an LTE arc column to a refractory cathode in atmospheric pressure argon, Physics of Plasmas, July 2020, American Institute of Physics, DOI: 10.1063/5.0013397.
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