Abstract
A general expression for the effective thermal conductivity of inhomogeneous media in terms of the Fourier components of the spatial variation of the conductivity is applied to composites consisting of inclusions in a continuous matrix. It is reformulated in terms of the mean square fluctuations of the conductivity. Specific cases treated are spherical inclusions and long cylinders, both random and with preferred directions. The results hold provided the difference in thermal conductivities is small or provided the concentration of inclusions is not too large. The theory fails if the thermal conductivity of the matrix is much smaller than that of the inclusions. The same considerations also apply to electrical conductivity.
Similar content being viewed by others
References
P. G. Klemens, Int. J. Thermophys. 10:1213(1989).
S. Kirkpatrick, Rev. Mod. Phys. 45:574 (1973).
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Klemens, P.G. Thermal conductivity of composites. Int J Thermophys 11, 971–976 (1990). https://doi.org/10.1007/BF00503587
Received:
Issue Date:
DOI: https://doi.org/10.1007/BF00503587