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Detailed numerical simulation of cathode spots in high-current vacuum arcs
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Orientador(es)
Resumo(s)
A detailed numerical model of cathode spots in
high-current vacuum arcs is given. The model provides a
complete description of all phases of life of an individual
spot taking into account the presence of metal vapor left
over from a previous explosion, the interaction of the
vaporized plasma from the cathode spot with the cathode
surface, and Joule heat generation in the cathode body.
Melting and motion of molten metal due to Lorentz force
are also accounted for, together with surface tension
effects and the pressure exerted by the plasma over the
cathode surface. First results are presented and analyzed
for copper cathodes with a protrusion and planar cathodes.
Emphasis is given to the investigation of the effect of the
vaporized plasma and of hydrodynamic processes. No
thermal runaway is observed.
Descrição
Palavras-chave
High-current vacuum arcs Cathode spots Numerical simulation . Faculdade de Ciências Exatas e da Engenharia
Contexto Educativo
Citação
Kaufmann, H. T. C., Cunha, M. D., Benilov, M. S., Hartmann, W., & Wenzel, N. (2016, September). Detailed numerical simulation of cathode spots in high-current vacuum arcs. In 2016 27th International Symposium on Discharges and Electrical Insulation in Vacuum (ISDEIV) (Vol. 2, pp. 1-4). IEEE. DOI: 10.1109/DEIV.2016.7763938
Editora
IEEE