End effects in the three-omega method to measure gas thermal conductivity

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Title End effects in the three-omega method to measure gas thermal conductivity
Author Yusibani, E.; Woodfield, Peter; Kohno, M.; Shinzato, K.; Takata, Y.; Fujii, M.
Journal Name International Journal of Thermophysics
Year Published 2009
Place of publication United States
Publisher Springer
Abstract A two-dimensional analytical solution is derived for the three-omega method for measurement of thermal conductivity of materials with a fine wire. The analytical solution includes the wire heat capacity and the effect of heat losses from the ends of the wire. To derive the solution, finite Fourier transforms are applied in the direction parallel to the wire axis. The solution is compared with a one-dimensional solution and experimental data. It is found that heat losses from the wire ends have a significant effect on the 3ω components at low frequency and tend to be less important at high frequency. Moreover, it is shown that two-dimensional effects will be severe for nano-scale wires, even if the wire length-to-diameter ratio is very large.
Peer Reviewed Yes
Published Yes
Alternative URI http://dx.doi.org/doi:10.1007/s10765-009-0572-8
Volume 30
Issue Number 3
Page from 833
Page to 850
ISSN 1572-9567
Date Accessioned 2010-10-25
Language en_AU
Faculty Faculty of Science, Environment, Engineering and Technology
Subject Mechanical Engineering
URI http://hdl.handle.net/10072/38346
Publication Type Journal Articles (Refereed Article)
Publication Type Code c1x

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