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

H. 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

H. 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
DOIs	https://doi.org/10.1016/j.ijheatmasstransfer.2015.03.001
Publication status	Published - Jul 2015
Externally published	Yes

Keywords

Deviation
Effective thermal conductivity
Foam structure
Improved model
Node size

ASJC Scopus subject areas

Condensed Matter Physics
Mechanical Engineering
Fluid Flow and Transfer Processes

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10.1016/j.ijheatmasstransfer.2015.03.001

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

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doi = "10.1016/j.ijheatmasstransfer.2015.03.001",

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

T2 - An improved model

AU - Yang, H.

AU - Zhao, M.

AU - Gu, Z. L.

AU - Jin, L. W.

AU - Chai, J. C.

PY - 2015/7

Y1 - 2015/7

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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JO - International Journal of Heat and Mass Transfer

JF - International Journal of Heat and Mass Transfer

ER -

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

Abstract

Keywords

ASJC Scopus subject areas

Access to Document

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