Thermal conductivity measurement of molten copper using an electromagnetic levitator superimposed with a static magnetic field

Yuya Baba, Takamitsu Inoue, Kenichi Sugioka, Hidekazu Kobatake, Hiroyuki Fukuyama, Masaki Kubo, Takao Tsukada

Research output: Contribution to journalArticlepeer-review

15 Citations (Scopus)

Abstract

The thermal conductivity of molten copper was measured by the periodic laser-heating method, in which a static magnetic field was superimposed to suppress convection in an electromagnetically levitated droplet, to extend the measurement range of the method up to a relatively high thermal conductivity. Before measuring the thermal conductivity, the optimum conditions for static magnetic field, the laser frequency of periodic heating and sample diameter were investigated by numerical simulation both for the flow and thermal fields in an electromagnetically levitated droplet and for the periodic laser heating of the droplet in the presence of melt convection. As a result, the temperature dependence of the thermal conductivity of molten copper was proposed in the temperature range between 1383 and 1665 K. In addition, by comparing our results with those of previous studies, it was demonstrated that the present method of measuring thermal conductivity is also available for molten materials with a relatively high thermal conductivity, such as molten copper.

Original languageEnglish
Article number045103
JournalMeasurement Science and Technology
Volume23
Issue number4
DOIs
Publication statusPublished - 2012 Jan 1

Keywords

  • electromagnetic levitation
  • molten copper
  • numerical simulation
  • static magnetic field
  • thermal conductivity measurement

ASJC Scopus subject areas

  • Instrumentation
  • Applied Mathematics

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