ZHANG Xinming, WANG Jiping, GU Qinyang. Influence of random porosity structure on thermal conductivity of heterogeneous porous foam[J]. CIESC Journal, 2014, (3): 879-883.
ZHANG Xinming, WANG Jiping, GU Qinyang. Influence of random porosity structure on thermal conductivity of heterogeneous porous foam[J]. CIESC Journal, 2014, (3): 879-883.DOI: 10.3969/j.issn.0438-1157.2014.03.016.
high specific surface area and particular performance. However
porous foam is always heterogeneous
the distribution of pore structure is random. In this study
a random parameter
pore uniformity U
is proposed to study the thermal conductivity of heterogeneous porous foam and analyze the influence of pore uniformity on its effective thermal conductivity based on graphite foam. Numerical results show that the thermal conductivity of porous foam material decreases with the increase of the randomness of pore structure. A relationship between pore uniformity
porosity and thermal conductivity of heterogeneous graphite foam is proposed and compared with those in literature. The present results are in reasonable agreement with the measured data of ORNL and reflect the influence of pore structures.