Anisotropic effective thermal conductivity measurement of various kinds of metal fiber materials

Naoto Haruki, Akihiko Horibe, Keigo Nakashima

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

Recently, metal fiber materials were made by laminating metal fibers with a diameter of about 30 μm to 300 μm. Since the almost metal fibers were oriented in the horizontal direction (the major axis of the fiber), these metal fiber materials are estimated to be anisotropic with an effective thermal conductivity. However, there is little quantitative data on the anisotropic effective thermal conductivity of the various kinds of metal fiber materials. The purpose of this study is to investigate the anisotropic effective thermal conductivity of various metal fiber materials experimentally and theoretically. In order to measure the horizontal and vertical effective thermal conductivities of these metal fiber materials, new measurement devices were developed. As a result, it is found that the anisotropic effective thermal conductivity of the various metal fiber materials was confirmed, and the horizontal and vertical effective thermal conductivities of these metal fiber materials depend on the bulk density or porosity, Young's modulus, the fiber length, and fiber diameter. And a dimensionless correlation equation for predicting the vertical and horizontal effective thermal conductivities of the various kinds of metal fiber materials was derived in terms of various dimensionless parameters.

Original languageEnglish
Pages (from-to)2385-2399
Number of pages15
JournalInternational Journal of Thermophysics
Volume34
Issue number12
DOIs
Publication statusPublished - Dec 2013

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metal fibers
thermal conductivity
fibers
modulus of elasticity

Keywords

  • Anisotropic thermal conductivity
  • Effective thermal conductivity
  • Guarded hot plate
  • Metal fiber materials

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

Anisotropic effective thermal conductivity measurement of various kinds of metal fiber materials. / Haruki, Naoto; Horibe, Akihiko; Nakashima, Keigo.

In: International Journal of Thermophysics, Vol. 34, No. 12, 12.2013, p. 2385-2399.

Research output: Contribution to journalArticle

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N2 - Recently, metal fiber materials were made by laminating metal fibers with a diameter of about 30 μm to 300 μm. Since the almost metal fibers were oriented in the horizontal direction (the major axis of the fiber), these metal fiber materials are estimated to be anisotropic with an effective thermal conductivity. However, there is little quantitative data on the anisotropic effective thermal conductivity of the various kinds of metal fiber materials. The purpose of this study is to investigate the anisotropic effective thermal conductivity of various metal fiber materials experimentally and theoretically. In order to measure the horizontal and vertical effective thermal conductivities of these metal fiber materials, new measurement devices were developed. As a result, it is found that the anisotropic effective thermal conductivity of the various metal fiber materials was confirmed, and the horizontal and vertical effective thermal conductivities of these metal fiber materials depend on the bulk density or porosity, Young's modulus, the fiber length, and fiber diameter. And a dimensionless correlation equation for predicting the vertical and horizontal effective thermal conductivities of the various kinds of metal fiber materials was derived in terms of various dimensionless parameters.

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