CORRECTION IN VOLUME FRACTION FOR EFFECTIVE THERMAL CONDUCTIVITY USING LOCAL FRACTAL TECHNIQUES
The model developed by Springer and Tsai is extended using non linear volume fraction in place of physical volume fraction for the effective thermal conductivity of composite materials with the help of local fractal techniques. The non-linear volume fraction, as a correction form is obtained using data available in the literature. Present model is constructed in the term of fiber volume fraction, the fiber-matrix thermal conductivity ratio and the local fractal dimensions. The effective thermal conductivity ratio is evaluated using the model with the approximation of the fractal dimensions. In the present work, this fractal dimensions (dp and dτ) considered to be equal in the absence of information about the arrangement of fibers in the composites. The technique of local fractal dimensions is used to reduce the geometric complexity of the fiber arrangements. Better agreement of predicted effective thermal conductivity values with experimental results is obtained. A comparison with other models is also done and found that our model predict the values of effective thermal conductivity quite well.
Effective thermal conductivity volume fraction polymer composites local fractal techniques correction term
Ramvir Singh R. S. Bhoopal P.K. Sharma
Heat Transfer Laboratory Department of Physics University of Rajasthan Jaipur – 302 004, India
国际会议
The Ninth Asian Thermophysical Properties Conference(第九届亚洲热物理性能会议 ATPC 2010)
北京
英文
1064-1068
2010-10-19（万方平台首次上网日期，不代表论文的发表时间）