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03-03-2024 | Original Article

A novel identification method for the non-equilibrium heat transfer problem in porous material

Authors: Hua-Yu Liu, Bao-Qi Zhang, Kai Yang, Xiao-Wei Gao

Published in: Engineering with Computers | Issue 5/2024

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Abstract

In this study, a novel method is proposed to effectively identify the thermal properties of porous composite materials, which are challenging to determine directly through experiments due to non-equilibrium heat transfer between the porous matrix and fluids. To solve the non-equilibrium heat transfer in saturated porous media and calculate temperature sensitivities to unknown properties, a complex-variables-based spectral element collocation method is developed. The proposed collocation method achieves high accuracy and employs an explicit time-marching approach to avoid repetitively solving of large-scale linear systems. Additionally, a normalization conjugate gradient method is introduced to overcome the slow convergence issue of the original conjugate gradient method caused by stiffness problems. Numerical cases demonstrate that this proposed method significantly improves efficiency in solving inverse non-equilibrium heat conservation problems, making it valuable for identifying complex systems with numerous unknown parameters.

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Metadata
Title
A novel identification method for the non-equilibrium heat transfer problem in porous material
Authors
Hua-Yu Liu
Bao-Qi Zhang
Kai Yang
Xiao-Wei Gao
Publication date
03-03-2024
Publisher
Springer London
Published in
Engineering with Computers / Issue 5/2024
Print ISSN: 0177-0667
Electronic ISSN: 1435-5663
DOI
https://doi.org/10.1007/s00366-024-01948-6