Thermal rectification in three-dimensional mass-graded anharmonic oscillator lattices

Abstract

In this work we study the thermal rectification efficiency, i.e., asymmetric heat flow, of a three-dimensional mass-graded anharmonic lattice of length $N$ and width $W$ by means of nonequilibrium molecular dynamics simulations. The obtained rectification, which is of the same order of magnitude as that of the corresponding one-dimensional lattice, saturates at low values of the aspect ratio $W/N$, consistent with the already known behavior of the corresponding heat fluxes of the homogeneous system under analogous conditions. The maximum rectification is obtained in the temperature range wherein no rectification could be obtained in other one-dimensional systems, as well as in the corresponding one-dimensional instance of the model studied herein.

6 pages, 7 figures

References in corpus (5)

• Thermal rectification and negative differential thermal resistance in lattices with mass gradient
• Magnetically Induced Thermal Rectification
• Thermal Rectification in Graded Materials
• Thermal rectification and negative differential thermal conductance in harmonic chains with nonlinear system-bath coupling
• Thermal rectification in oscillator lattices with a ballistic spacer and next nearest-neighbor interactions