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ISSN Online: 2377-424X

ISBN Print: 978-1-56700-474-8

ISBN Online: 978-1-56700-473-1

International Heat Transfer Conference 16
August, 10-15, 2018, Beijing, China

SIMULTANEOUS IDENTIFICATION OF THERMAL CONDUCTIVITY AND ABSORPTION COEFFICIENT OF A HOMOGENEOUS MEDIUM

Get access (open in a dialog) DOI: 10.1615/IHTC16.tpm.022812
pages 8834-8841

Sinopsis

The aim of this work is to develop methods and tools for the characterization of thermophysical properties of semi-transparent materials often used in the industrial and the transport sectors. The study is realized by coupling an inverse method, build on a particle swarm optimization (PSO) algorithm, with a numerical resolution of the transient combined conductive-radiative heat transfer equations obtained by P1 radiation approach and finite volume method. Preliminary work performed in one-dimension with imposed flux and convection boundary conditions has demonstrated the feasibility, the robustness as well as the limitation of the strategy to simultaneously identify the thermal conductivity and the absorption coefficient of semitransparent materials. On this basis, a two-dimensional axisymmetric model is developed and validated in order to get closer to the experimental protocol based on the well-known flash method. The ability of the method to retrieve the parameters from direct simulation under different noise intensity is also verified. Finally, the confrontation with experimental data is carried out in order to show the efficiency of the strategy for solving practical problems.