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

Hui Yan Yang; M. Zhao; Z. L. Gu; L. W. Jin; J. C. Chai

doi:10.1016/j.ijheatmasstransfer.2015.03.001

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

Hui Yan Yang, M. Zhao, Z. L. Gu, L. W. Jin, J. C. Chai

Research output: Contribution to journal › Article › peer-review

26 Citations (Scopus)

Abstract

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 (^ks=218Wm^-1K^-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 (^ks=8.5Wm^-1K^-1), the relative RMS deviation is about 7.4%.

Original language	English
Pages (from-to)	207-211
Number of pages	5
Journal	International Journal of Heat and Mass Transfer
Volume	86
Early online date	19 Mar 2015
DOIs	https://doi.org/10.1016/j.ijheatmasstransfer.2015.03.001
Publication status	Published - 1 Jul 2015

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title = "A further discussion on the effective thermal conductivity of metal foam: An improved model",

abstract = "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 (ks=218Wm-1K-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 (ks=8.5Wm-1K-1), the relative RMS deviation is about 7.4%.",

keywords = "Deviation, Effective thermal conductivity, Foam structure, Improved model, Node size",

author = "Yang, {Hui Yan} and M. Zhao and Gu, {Z. L.} and Jin, {L. W.} and Chai, {J. C.}",

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T2 - An improved model

AU - Yang, Hui Yan

AU - Zhao, M.

AU - Gu, Z. L.

AU - Jin, L. W.

AU - Chai, J. C.

PY - 2015/7/1

Y1 - 2015/7/1

N2 - 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 (ks=218Wm-1K-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 (ks=8.5Wm-1K-1), the relative RMS deviation is about 7.4%.

AB - 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 (ks=218Wm-1K-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 (ks=8.5Wm-1K-1), the relative RMS deviation is about 7.4%.

KW - Deviation

KW - Effective thermal conductivity

KW - Foam structure

KW - Improved model

KW - Node size

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VL - 86

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EP - 211

JO - International Journal of Heat and Mass Transfer

JF - International Journal of Heat and Mass Transfer

SN - 0017-9310

ER -

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

Abstract

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