Effects of Interface Thermal Resistance on the Heat Transfer for a Non-Planar Thin Film System

• Main Authors: Jiang -Ping Wang, 王建評
• Other Authors: Hsin-Sen Chu
• Format: Others
• Language: zh-TW
• Published: 2002
• Online Access: http://ndltd.ncl.edu.tw/handle/58475900333939704595

碩士 === 國立交通大學 === 機械工程系 === 90 === This study deals with the effects of interface thermal resistance on the heat transfer for a non- planar thin film system based on the microscopic heat transport theory. In the acoustic thin limit, where the film thickness is much less than the phonon mean free path, macroscopic heat transport theory can’t be applied. The equation of phonon radiative transfer is applied to analyze the effects of curvature and film thickness on the thermal conductivity of thin film system, including interfacial effects. The results showed a significant reduction of effective thermal conductivity when the film thickness is getting thinner. Phonon heat conduction is in high non-equilibrium state inside the film and boundary scattering effect is dominant here. The agreements between the present predictions of the thermal conductivity and the experimental data are achieved. Furthermore, curvature also has significant effect on the thermal conductivity. Larger curvature would enhance energy transport inside the thin film. Regarding for inelastic diffuse mismatch model, thermal resistances can be treated as a constant. Both size and curvature effects can’t be evident to see.