Analysis of Micro-Scale Heat Transfer in Multi- Layered Thin Films with Contact Conductance

• Main Authors: Jian-Jian Lin, 林建宏
• Other Authors: Yung-Ming Lee
• Format: Others
• Language: zh-TW
• Published: 2008
• Online Access: http://ndltd.ncl.edu.tw/handle/81407113052117290160

碩士 === 逢甲大學 === 航太與系統工程所 === 96 === The dual-phase-lag (DPL) model is applied to investigate the thermal behavior of a multi-layered material subjected to ultra-fast pulse-laser heating. The effect of interfacial contact conductance existing at the interface on the temperature solution is also investigated. In addition, the relaxation time of heat flux, the relaxation time of temperature gradient and thermal diffusivity are also taking into account in this study. At first, the Laplace transform is applied to the governing equations. Afterward, the temperature field can be computed by the inversion of Laplace transform. The results showed that the temperature field is changing dramatically in the vicinity of the interface during the very early stage of the heating process even though the thermal resistance is extremely small. In order to eliminate the mechanical failure, the contact conductance existing at the interface should be as large as possible. Moreover, the thickness of layer-I can also affect the temperature solution.