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Pisma v Zhurnal Tekhnicheskoi Fiziki, 2016, Volume 42, Issue 16, Pages 48–55
(Mi pjtf6328)
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This article is cited in 28 scientific papers (total in 28 papers)
The mechanism of liquid metal jet formation in the cathode spot of vacuum arc discharge
M. A. Gashkova, N. M. Zubarevab, G. A. Mesyatsab, I. V. Uimanova a Institute of Electrophysics, Ural Branch, Russian Academy of Sciences, Ekaterinburg
b P. N. Lebedev Physical Institute of the Russian Academy of Sciences, Moscow
Abstract:
We have theoretically studied the dynamics of molten metal during crater formation in the cathode spot of vacuum arc discharge. At the initial stage, a liquid-metal ridge is formed around the crater. This process has been numerically simulated in the framework of the two-dimensional axisymmetric heat and mass transfer problem in the approximation of viscous incompressible liquid. At a more developed stage, the motion of liquid metal loses axial symmetry, which corresponds to a tendency toward jet formation. The development of azimuthal instabilities of the ridge is analyzed in terms of dispersion relations for surface waves. It is shown that maximum increments correspond to instability of the Rayleigh–Plateau type. Estimations of the time of formation of liquid metal jets and their probable number are obtained.
Received: 31.03.2016
Citation:
M. A. Gashkov, N. M. Zubarev, G. A. Mesyats, I. V. Uimanov, “The mechanism of liquid metal jet formation in the cathode spot of vacuum arc discharge”, Pisma v Zhurnal Tekhnicheskoi Fiziki, 42:16 (2016), 48–55; Tech. Phys. Lett., 42:8 (2016), 852–855
Linking options:
https://www.mathnet.ru/eng/pjtf6328 https://www.mathnet.ru/eng/pjtf/v42/i16/p48
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