Novel Mixing Relations for Determining the Effective Thermal Conductivity of Open-Cell Foams

被引：1

作者：

Hernandez, Jesus Nain Camacho ^{[1
]}

Link, Guido ^{[1
]}

Schubert, Markus ^{[2
]}

Hampel, Uwe ^{[2
,3
]}

机构：

[1] Karlsruhe Inst Technol, Inst Pulsed Power & Microwave Technol IHM, Hermann Von Helmholtz Pl 1, D-76344 Karlsruhe, Germany

[2] Helmholtz Zentrum Dresden Rossendorf, Inst Fluid Dynam, Bautzner Landstr 400, D-01328 Dresden, Germany

[3] Tech Univ Dresden, Chair Imaging Tech Energy & Proc Engn, D-01062 Dresden, Germany

来源：

MATERIALS | 2022年 / 15卷 / 06期

关键词：

open-cell foams; effective permittivity; thermal conductivity; platonic solids; HEAT-TRANSFER; MODEL; PERMEABILITY; PREDICTION; BOUNDS;

D O I：

10.3390/ma15062168

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

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.

引用

页数：10

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