a National Laboratory for Infrared Physics, Shanghai Institute of Technical Physics, Chinese Academy of Science, Shanghai 200083, China; b Department of Physics, Suzhou University, Suzhou 215006, China
Abstract The effect of radial thickness on the thermal conductivity of a free standing wire is investigated. The thermal conductivity is evaluated using the Boltzmann equation. A simple expression for the reduction in conductivity due to the increase of boundary scattering is presented. A comparison is made between the experimental results of indium wires and the theoretical calculations. It is shown that this decrease of conductivity in wires is smaller than that in film where heat flux is perpendicular to the surface.
Received: 14 March 2000
Revised: 03 November 2000
Accepted manuscript online:
PACS:
72.15.Eb
(Electrical and thermal conduction in crystalline metals and alloys)
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