Effective thermal conductivity of copper powders

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Abstract
Effective thermal conductivity of copper powders of different particle size has been measured experimentally at room temperature and normal pressure using the transient hot strip method. A variation in the values of the effective thermal conductivity of these powders with their porosities is observed. To explain this variation a model for a two-phase system (powders) is developed. Theoretical calculations of the effective thermal conductivity of powders using this model and a model developed by Hadley (1986) (volume-averaging formalism) have been carried out. It has been found on comparison that the theoretical results are in good agreement with the experiment.