We have discovered a mistake in our original derivation related to the definition of the apparent conductivity due to orientation averaging. Equation (23) needs to be corrected to
and the similar adjustment needs to be made in the two-dimensional case:
Finally, Equation (39) and the corresponding text becomes: ”…, define a certain indicator of the real microstructure kcorr, e.g. as a ratio of the modified and original partial temperature gradient concentration factors
now determined for circular inclusions.”
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