New theoretical equation for effective thermal conductivity of two-phase composite materials

A new theoretical equation that describes the thermal conductivity of a two-phase composite is proposed. The Cheng-Vachon equation has been modified, and a new parameter, i.e. the modified volume fraction, is introduced. The modified volume fraction is a function of the physical volume fraction and...

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Bibliographic Details
Published inMaterials science and technology Vol. 28; no. 5; pp. 620 - 626
Main Authors Li, X Y, Zhao, X L, Guo, X Y, Shao, Z M, Ai, M X
Format Journal Article
LanguageEnglish
Published London, England Taylor & Francis 01.05.2012
SAGE Publications
Taylor & Francis Ltd
Subjects
Aluminum
Cellular
Cellular concrete
Composite materials
Composites
Conductivity
Copper
Effective thermal conductivity
Fractions
Heat conductivity
Heat transfer
Mathematical analysis
Phase transitions
Phases
Thermal conductivity
Volume fraction
Effective thermal conductivity
Composites
Volume fraction
Cellular concrete
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Summary:A new theoretical equation that describes the thermal conductivity of a two-phase composite is proposed. The Cheng-Vachon equation has been modified, and a new parameter, i.e. the modified volume fraction, is introduced. The modified volume fraction is a function of the physical volume fraction and thermal conductivity ratio of constituent phases. It was found that the new equation can describe the thermal conductivity of different two-phase composites, such as Cu/solder, Al/water, Al/air and cellular concrete, very accurately.
Bibliography:ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
ISSN:0267-0836
1743-2847
DOI:10.1179/1743284711Y.0000000112