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Study on general calculating method of thermal conductivity for porous materials


X. Dehong1, D. Zheng1, H. Xuejun2 and L. Xin3

1University of Science & Technology Beijing, Beijing, P.R. China
2School of Environment and Energy Engineering, Beijing University of Civil Engineering and Architecture, Beijing, P.R. China
3Beijing Society of Thermophysics and Energy Engineering, Beijing , P.R. China

Keywords: thermal conductivity
property: thermal conductivity
material: porous material

According to the internal heat-transfer mechanism of porous materials, a general Binarization Array method is established for calculating thermal conductivity of porous materials. Based on the method, the thermal conductivities of 3-D closed-cell foam aluminum and 2-D alumina-silicate refractory fiber materials are calculated, which fit very well with the experimental results proving the correctness and universality of the method.

References
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  2. Zhang Xiaoli, Chen Jiezhen, Cui Zhikai. Thermal conductivity of ordinary alumino-silicate refractory fiber felts. Iron and Steel. A 29(9),62-66(1994).

  3. Abu-Hamdeh N H, Khdair A I, Reeder R C. A comparison of two methods used to evaluate thermal conductivity for porous media. International Journal of Heat and Mass Transfer. A 44, 1073-1078(2001).

  4. Staggs J E J. Estimating the thermal conductivity of chars and porous residues using thermal resistor networks. Fire Safety Journal. A 37,107-119(2002).

  5. Yu Boming. Analysis of heat and mass transfer in fractal media. Journal of Engineering Thermophysics. A 24(3), 481-483(2003).

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