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 journalArticle

10 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 languageEnglish
Pages (from-to)207-211
Number of pages5
JournalInternational Journal of Heat and Mass Transfer
Volume86
DOIs
Publication statusPublished - 2015

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metal foams
Foams
Thermal conductivity
thermal conductivity
Metals
foams
deviation
predictions
Aluminum
Carbon
Porosity
aluminum
porosity
Fluids
Water
causes
carbon
fluids
air
Air

Cite this

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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{\%}.",
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A further discussion on the effective thermal conductivity of metal foam : An improved model. / Yang, Hui Yan; Zhao, M.; Gu, Z. L.; Jin, L. W.; Chai, J. C.

In: International Journal of Heat and Mass Transfer, Vol. 86, 2015, p. 207-211.

Research output: Contribution to journalArticle

TY - JOUR

T1 - A further discussion on the effective thermal conductivity of metal foam

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

Y1 - 2015

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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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JO - International Journal of Heat and Mass Transfer

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