Numerical and experimental analysis of a RVE condition for heterogeneous materials using BEM and thermal images

ABSTRACT: This work focuses on the numerical and experimental study of the effective thermal conductivity in materials with heterogeneous composition. The numerical analysis relies in the Boundary Element method (BEM) formulation assisted by the sub-regions technique to simulate a two-dimensional sq...

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Autores principales:	Oberg,Matheus B.A.M., Anflor,Carla T.M.
Lenguaje:	English
Publicado:	Universidad de Tarapacá. 2017
Materias:	Boundary element method heterogeneous materials representative volume element thermal images
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-33052017000200217
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spelling	oai:scielo:S0718-330520170002002172017-06-19Numerical and experimental analysis of a RVE condition for heterogeneous materials using BEM and thermal imagesOberg,Matheus B.A.M.Anflor,Carla T.M. Boundary element method heterogeneous materials representative volume element thermal images ABSTRACT: This work focuses on the numerical and experimental study of the effective thermal conductivity in materials with heterogeneous composition. The numerical analysis relies in the Boundary Element method (BEM) formulation assisted by the sub-regions technique to simulate a two-dimensional square domain, with randomly distributed material inclusions. The boundary conditions are set to achieve a unidirectional heat flux condition. The Average Field Theory (AFT) is applied to determinate the representative volume element (RVE) condition for the studied cases. Finally, the effective heat conduction coefficient is obtained from the defined RVE's. To verify the obtained numerical results, it is proposed an experimental procedure based on thermal images. The experimental assembly replicates the unidirectional heat flux condition over a steel plate. The experimental effective thermal conductivity is obtained from the analysis of the resultant temperature field on the surface of the plate taken by an infrared camera. The comparison between the numerical and experimental results showed a 3% difference between both results, pointing out for the successfulness of the proposed methodology.info:eu-repo/semantics/openAccessUniversidad de Tarapacá.Ingeniare. Revista chilena de ingeniería v.25 n.2 20172017-06-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-33052017000200217en10.4067/S0718-33052017000200217
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Boundary element method heterogeneous materials representative volume element thermal images
spellingShingle	Boundary element method heterogeneous materials representative volume element thermal images Oberg,Matheus B.A.M. Anflor,Carla T.M. Numerical and experimental analysis of a RVE condition for heterogeneous materials using BEM and thermal images
description	ABSTRACT: This work focuses on the numerical and experimental study of the effective thermal conductivity in materials with heterogeneous composition. The numerical analysis relies in the Boundary Element method (BEM) formulation assisted by the sub-regions technique to simulate a two-dimensional square domain, with randomly distributed material inclusions. The boundary conditions are set to achieve a unidirectional heat flux condition. The Average Field Theory (AFT) is applied to determinate the representative volume element (RVE) condition for the studied cases. Finally, the effective heat conduction coefficient is obtained from the defined RVE's. To verify the obtained numerical results, it is proposed an experimental procedure based on thermal images. The experimental assembly replicates the unidirectional heat flux condition over a steel plate. The experimental effective thermal conductivity is obtained from the analysis of the resultant temperature field on the surface of the plate taken by an infrared camera. The comparison between the numerical and experimental results showed a 3% difference between both results, pointing out for the successfulness of the proposed methodology.
author	Oberg,Matheus B.A.M. Anflor,Carla T.M.
author_facet	Oberg,Matheus B.A.M. Anflor,Carla T.M.
author_sort	Oberg,Matheus B.A.M.
title	Numerical and experimental analysis of a RVE condition for heterogeneous materials using BEM and thermal images
title_short	Numerical and experimental analysis of a RVE condition for heterogeneous materials using BEM and thermal images
title_full	Numerical and experimental analysis of a RVE condition for heterogeneous materials using BEM and thermal images
title_fullStr	Numerical and experimental analysis of a RVE condition for heterogeneous materials using BEM and thermal images
title_full_unstemmed	Numerical and experimental analysis of a RVE condition for heterogeneous materials using BEM and thermal images
title_sort	numerical and experimental analysis of a rve condition for heterogeneous materials using bem and thermal images
publisher	Universidad de Tarapacá.
publishDate	2017
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-33052017000200217
work_keys_str_mv	AT obergmatheusbam numericalandexperimentalanalysisofarveconditionforheterogeneousmaterialsusingbemandthermalimages AT anflorcarlatm numericalandexperimentalanalysisofarveconditionforheterogeneousmaterialsusingbemandthermalimages
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Numerical and experimental analysis of a RVE condition for heterogeneous materials using BEM and thermal images

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