New Models for Thermal Conductivity of Particulate Composites

Abstract

Three new models for the effective thermal conductivity of concentrated particulate composites are developed using the differential effective medium approach. One model predicts the relative thermal conductivity (K_r) of a particulate composite to be a function of two variables, namely thermal conductivity ratio λ (ratio of dispersed-phase to continuous-phase conductivities) and volume fraction of particles φ. The other two models predict K_r to be a function of three variables, namely, λ, φ, and φ_m where φ_m is the maximum packing volume fraction of particles. The proposed models are evaluated using twelve sets of published experimental data on the thermal conductivity of particulate composites, covering broad ranges of λ and φ.

Keywords

composite particulate composite thermal conductivity thermal properties two-phase material.

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