A Modified Theoretical Model to Predict the Thermal Interface Conductance Considering Interface Roughness
arXiv:1612.05357 · doi:10.3389/fenrg.2018.00048
Abstract
The acoustic mismatch model and the diffuse mismatch model have been widely used to predict the thermal interface conductance. However, the acoustic mismatch model (diffuse mismatch model) is based on the hypothesis of a perfectly smooth (completely disordered) interface. 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 transmissions into account, the mixed mismatch model 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. It shows that the predicted results of the mixed mismatch model match well with the values of molecular dynamics simulation and experimental data.
20 pages, 9 figures, 1 table
References in corpus (12)
- Band alignment of two-dimensional transition metal dichalcogenides: application in tunnel field effect transistors
- Thermal transport in nanostructures
- Nano-Cross-Junction Effect on Phonon Transport in Silicon-Nanowire-Cages
- Thermal boundary conductance across rough interfaces probed by molecular dynamics
- Experimental metrology to obtain thermal phonon transmission coefficients at solid interfaces
- Thermal Interface Conductance between Aluminum and Silicon by Molecular Dynamics Simulations
- Probing and tuning inelastic phonon conductance across finite-thickness interface
- Phonon nanocapacitor for storage and lasing of terahertz lattice waves
- Probing the phonon surface interaction by wave packet simulation: effect of roughness and morphology
- Effect of Electron-Phonon Coupling on Thermal Transport across Metal-Nonmetal Interface - A Second Look
- Role of crystal structure and junction morphology on interface thermal conductance
- Fresnel transmission coefficients for thermal phonons at solid interfaces