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Calculations of the Thermal Conductivity of Porous Materials

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Abstract:

In this paper, the geometrical effective thermal conductivity of porous materials is investigated based on two different approaches: the finite element method as a representative for numerical approximation methods and an analytical method for 2D homogenised models based on a solution of the respective boundary value problem. It is found that the relative conductivity is practically independent of the specific shape or topology of the inclusions. Only the morphology (closed-cell or open-cell) of the structure slightly influences the conductivity. Furthermore, it is shown that a small perturbation of the circular inclusions of 2D models increases the effective conductivity.

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Advanced Materials Forum III View Preview

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Periodical:

Materials Science Forum (Volumes 514-516)

Pages:

754-758

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.514-516.754

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Online since:

May 2006

Authors:

Thomas Fiedler, Ekaterina Pesetskaya, Andreas Öchsner, José Grácio

Keywords:

Effective Conductivity, Heat Transfer, Mathematical Modeling, Numerical Modeling, Porous Material

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© 2006 Trans Tech Publications Ltd. All Rights Reserved

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