Using equivalent inclusion approach and FFT numerical simulation to determine the thermal conductivity of three phase material with doubly-coated inclusion

Abstract

This article introduces the equivalent inclusion approach (EI) and
Fast fourier transformation method (FFT) to calculate macroscopic
conductivity for three phase material with doubly-coated circles
inclusion in two-dimensional space. We applied equivalent approach
and FFT methods to determine the effective conductivity for some
isotropic composite material model in two-dimensional space. The
results are compared with estimate of Hashin-Strikman (HS).