Thermal rectification of asymmetrically-defective materials

Hiroyuki Hayashi, Yohei Ito, Koji Takahashi

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

We conducted numerical simulations of heat conduction in one-dimensional (1D) nonlinear lattices to reveal the mechanism of thermal rectification of asymmetrically-defective materials. A decreased spring constant simulates the defective lattice and the obtained temperature profile suggests a thermal resistance existing at the interface of two linked segments with different spring constants. Our numerical results suggest that the thermal rectification of two-segment system is dependent on the spring constant and temperature gradient. Introducing the estimated phonon band, most of the rectification mechanisms are clearly explained and performance limit as a thermal rectifier is found for the defective/pristine materials.

Original languageEnglish
Pages (from-to)27-32
Number of pages6
JournalJournal of Mechanical Science and Technology
Volume25
Issue number1
DOIs
Publication statusPublished - Jan 1 2011

All Science Journal Classification (ASJC) codes

  • Mechanics of Materials
  • Mechanical Engineering

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