碳纳米管为填充物的纳米流体的有效热导率

The Effective Thermal Conductivity of Carbon Nanotube Based Composites

通过考虑几何各向异性和界面效应,应用我们推广的微分有效媒质理论去研究纳米流体的热导率增强。重点研究了纳米颗粒的纵横比和界面热阻在对体系有效热导率增强的影响。通过和实验数据比较,推广的有效媒质理论可以委好的解释多壁碳纳米管/油米流体的确良异常增强,而且还成功的解释了在低体积分数下随体积分数增加而出现的非线性行为。

By taking into account the physical anisotropy, geometrical anisotropy and the effect of interracial thermal resistance, we generalize differential effective medium approximation to investigate the thermal conductivity of carbon nanotube based nanofluids. To one＇s interest,our theoretical results are in good agreement with recent experimental eata on nanofluids. In particular,our theoretical predictions successfully show the nonlinear dependence of effective thermal conductivity on the volume fractions of nanotubes.