A modified theoretical model to accurately account for interfacial roughness in predicting the interfacial thermal conductance

Yingying Zhang, Dengke Ma, Yi Zang, Xiaojia Wang, Nuo Yang

Research output: Contribution to journalArticle

8 Scopus citations

Abstract

The acoustic mismatch model and the diffuse mismatch model (DMM) have been widely used to predict the thermal interface conductance. However, the acoustic mismatch model and the DMM are based on the hypothesis of a perfectly smooth interface and a completely disordered interface respectively. Here, we present a new modified model, named as the mixed mismatch model, which considers the roughness/bonding at the interface. By taking partially specular and partially diffuse transmission into account, the mixed mismatch model (MMM) can predict the thermal interface conductance with arbitrary roughness. The proportions of specular and diffuse transmission are determined by the interface roughness which is described by the interfacial density of states. We show that the predicted results of the MMM match well with the values of molecular dynamics simulation and experimental data.

Original languageEnglish (US)
Article number48
JournalFrontiers in Energy Research
Volume6
Issue numberJUN
DOIs
StatePublished - Jun 13 2018

Keywords

  • Acoustic mismatch model
  • Diffuse mismatch model
  • Interfacial density of states
  • Mixed mismatch model
  • Thermal interface conductance

How much support was provided by MRSEC?

  • Partial

Reporting period for MRSEC

  • Period 5

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  • Projects

    MRSEC SEED Projects

    11/1/14 → …

    Project: Research project

    University of Minnesota MRSEC (DMR-1420013)

    Lodge, T. P.

    11/1/1410/31/20

    Project: Research project

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