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Homogeneity in a Metal Wire under Melting

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Abstract

Results of numerical simulations of the melting wave in a tungsten wire heated by a high-power nanosecond current pulse are presented. To take into account the hydrodynamic effects under melting, a semiempirical multiphase equation of state for tungsten is used. The structure of the melting wave at different parameters of the heating is studied, and a theoretical evaluation for the thickness of this wave, δm, is proposed. The homogeneity of the distribution of parameters over the wire can be expected in the case of δm >> a0, where a0 is the initial radius of the wire. The melting wave can be considered as a discontinuity of thermophysical properties of the solid and liquid phases at δm << a0.

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Authors and Affiliations

  1. Institute for High Energy Densities, Russian Academy of Sciences, Izhorskaya 13/19, Moscow, 125412, Russia

    S. I. Tkachenko, K. V. Khishchenko & P. R. Levashov

Authors
  1. S. I. Tkachenko
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  2. K. V. Khishchenko
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  3. P. R. Levashov
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Correspondence to S. I. Tkachenko.

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Paper presented at the Seventh International Workshop on Subsecond Thermophysics, October 6–8, 2004, Orléans, France.

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Tkachenko, S.I., Khishchenko, K.V. & Levashov, P.R. Homogeneity in a Metal Wire under Melting. Int J Thermophys 26, 1167–1179 (2005). https://doi.org/10.1007/s10765-005-6709-5

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