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SENSITIVITY ANALYSIS OF EFFECTIVE THERMAL CONDUCTIVITY OF OPEN-CELL CERAMIC FOAMS USING A SIMPLIFIED MODEL BASED ON DETAILED STRUCTURE

Volume 6, Issue 1, 2015, pp. 1-10
DOI: 10.1615/SpecialTopicsRevPorousMedia.v6.i1.10
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ABSTRACT

The effective thermal conductivity (ETC) of open-cell porous foams can be predicted from the detailed numerical simulation, considering the complex foam structure obtained from three-dimensional (3D) computed tomography (CT)-scan images. An alternative approach could be to consider simplified models for a quick and accurate estimation of ETC. A model for ETC of open-cell porous foams, using such a simplified approach, has been proposed recently which relies upon a single numerical prediction of the dimensionless ETC under vacuum condition, evaluated using the detailed foam structure obtained from 3D CT-scan information. This model is applied in the present study in order to analyze the influence of different parameters, namely, the microscopic porosity within the bulk solid material and the direction of heat transfer on ETC of open-cell ceramic foams. Additionally, a structural analysis of the foams is carried out in order to estimate several geometric parameters that may influence ETC. The present investigation demonstrates that the considered simplified modeling approach offers reasonable accuracy with significantly reduced computational effort for the sensitivity analysis of ETC to different parameters.

CITED BY
  1. Mendes Miguel A.A., Goetze Pitt, Talukdar Prabal, Werzner Eric, Demuth Cornelius, Rössger Philip, Wulf Rhena, Gross Ulrich, Trimis Dimosthenis, Ray Subhashis, Measurement and simplified numerical prediction of effective thermal conductivity of open-cell ceramic foams at high temperature, International Journal of Heat and Mass Transfer, 102, 2016. Crossref

  2. Kumari M., Kumar M., Barak M. S., Wave propagation characteristics at the welded interface of double-porosity solid and double-porosity dual-permeability materials, Waves in Random and Complex Media, 31, 6, 2021. Crossref

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