Investigation of effective thermoelectric properties of composite with interfacial resistance using micromechanics-based homogenisation

Jiyoung Jung, Sangryun Lee, Byungki Ryu, Seunghwa Ryu

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23 Scopus citations

Abstract

We obtained the analytical expression for the effective thermoelectric properties and dimensionless figure of merit of a composite with interfacial electrical and thermal resistances using a micromechanics-based homogenisation. For the first time, we derived the Eshelby tensor for a spherical inclusion as a function of the interfacial resistances and obtained the solutions of the effective Seebeck coefficient and the electrical and thermal conductivities of a composite, which were validated against finite-element analysis (FEA). Our analytical predictions well match the effective properties obtained from FEA with an inclusion volume fraction up to 15%. Because the effective properties were derived with the assumption of a small temperature difference, we discuss a heuristic method for obtaining the effective properties in the case where a thermoelectric composite is subjected to a large temperature difference.

Original languageEnglish
Article number118620
JournalInternational Journal of Heat and Mass Transfer
Volume144
DOIs
StatePublished - Dec 2019

Bibliographical note

Publisher Copyright:
© 2019 Elsevier Ltd

Keywords

  • Homogenisation
  • Interfacial electrical resistance
  • Interfacial thermal resistance
  • Thermoelectricity

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