Camacho Hernandez Jesus Nain, Link Guido, Schubert Markus, Hampel Uwe
Institute for Pulsed Power and Microwave Technology IHM, Karlsruhe Institute of Technology, Hermann-von-Helmholtz-Platz 1, 76344 Karlsruhe, Germany.
Institute of Fluid Dynamics, Helmholtz-Zentrum Dresden-Rossendorf, Bautzner Landstr. 400, 01328 Dresden, Germany.
Materials (Basel). 2022 Mar 15;15(6):2168. doi: 10.3390/ma15062168.
This paper proposes a new approach to relate the effective thermal conductivity of open-cell solid foams to their porosity. It is based on a recently published approach for estimating the dielectric permittivity of isotropic porous media. A comprehensive assessment was performed comparing the proposed mixing relation with published experimental data for thermal conductivity and with numerical data from state-of-the-art relations. The mixing relation for the estimation of thermal conductivities based on dodecahedrons as building blocks shows good agreement with experimental data over a wide range of porosity.
本文提出了一种将开孔固体泡沫的有效热导率与其孔隙率相关联的新方法。它基于最近发表的一种用于估计各向同性多孔介质介电常数的方法。进行了全面评估，将所提出的混合关系与已发表的热导率实验数据以及来自最新关系的数值数据进行了比较。基于十二面体作为构建单元来估计热导率的混合关系在很宽的孔隙率范围内与实验数据显示出良好的一致性。
