Experimental Analysis and COMSOL Simulation on Interfacial Heat Transfer between Different Materials

• Main Authors: Tza-RenWang, 王澤仁
• Other Authors: Long-Sun Chao
• Format: Others
• Language: zh-TW
• Published: 2015
• Online Access: http://ndltd.ncl.edu.tw/handle/79a2g8

碩士 === 國立成功大學 === 工程科學系 === 103 === Two different materials are put together. From the macroscopic viewpoint, they intuitively seem to be perfect contact at the interface. However, from the microscopic one, they are not perfect contact because the contact surfaces are microscopically rough regardless of being macroscopically smooth. In general, the easiest assumption for the interface analysis is perfect contact, where the temperature and heat flux are continuous. However, the assumption deviates from the practical condition. To study the imperfect contact interface is the key point of the thesis. In the work, the numerical simulation and the experimental analysis are used to investigate the interfacial phenomenon. In the experimental study, copper and aluminium are used as the testing materials, input power and external pressure are utilized as the working parameters, and temperatures in these two materials are measured for the analyses. In the study, the finite difference is employed to inversely calculate the effective heat transfer coefficients at the interface by using the measured temperature data. COMSOL is used to analyse the temperature distribution after the coefficients are obtained. In the thesis, the effects of working parameters on the effective heat transfer coefficients and the corresponding temperature profiles are studied.