A further discussion on the effective thermal conductivity of metal foam: An improved model

被引：22

作者：

Yang, H. ^{[1
]}

Zhao, M. ^{[2
]}

Gu, Z. L. ^{[2
]}

Jin, L. W. ^{[2
]}

Chai, J. C. ^{[3
]}

机构：

[1] Xi An Jiao Tong Univ, Sch Energy & Power Engn, Xian 710049, Shaanxi, Peoples R China

[2] Xi An Jiao Tong Univ, Sch Human Settlements & Civil Engn, Xian 710049, Shaanxi, Peoples R China

[3] Univ Huddersfield, Sch Comp & Engn, Dept Engn & Technol, Huddersfield HD1 3DH, W Yorkshire, England

来源：

INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER | 2015年 / 86卷

关键词：

Effective thermal conductivity; Foam structure; Node size; Deviation; Improved model; CELL POROUS FOAMS; HEAT-TRANSFER; PREDICTION;

D O I：

10.1016/j.ijheatmasstransfer.2015.03.001

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

In this study, we explain the causes and effects of the geometrical impossible result encountered in the widely adopted tetrakaidecahedron model (Boomsma and Poulikakos, 2001; Dai et al., 2010) for the effective thermal conductivities (ETCs) of metal foam. The geometrical impossible result is successfully eliminated by accounting for the size variation of the node with porosity. The improved model provides predictions of ETCs that are more precise than available models. For aluminum foams (k(s) = 218 W m(-1) K-1) using water and air as fluid media, the relative root-mean-square (RMS) deviation of the present predictions from the experimental data is about 5.3%; for the reticulated vitreous carbon (RVC) foams (k(s) = 8.5 W m(-1) K-1), the relative RMS deviation is about 7.4%. (C) 2015 Elsevier Ltd. All rights reserved.

引用

页码：207 / 211

页数：5

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