Evaluation of the anisotropic radiative conductivity of a low-density carbon fiber material from realistic microscale imaging

Nima Nouri; Francesco Panerai; Kaveh A. Tagavi; Nagi N. Mansour; Alexandre Martin

doi:10.1016/j.ijheatmasstransfer.2015.12.004

Evaluation of the anisotropic radiative conductivity of a low-density carbon fiber material from realistic microscale imaging

Nima Nouri
, Francesco Panerai
, Kaveh A. Tagavi
, Nagi N. Mansour
, Alexandre Martin

Producción científica: Article › revisión exhaustiva

27 Citas (Scopus)

Resumen

The radiative heat transfer inside a low-density carbon fiber insulator is analyzed using a three-dimensional direct simulation model. A robust procedure is presented for the numerical calculation of the geometric configuration factor to compute the radiative energy exchange processes among the small discretized surface areas of the fibrous material. The methodology is applied to a polygonal mesh of a fibrous insulator obtained from three-dimensional microscale imaging of the real material. The anisotropic values of the radiative conductivity are calculated for that geometry. The results yield both directional and thermal dependence of the radiative conductivity. The combined value of radiative and solid conductivity are compared to experimental data available in the literature, and show excellent agreement.

Idioma original	English
Páginas (desde-hasta)	535-539
Número de páginas	5
Publicación	International Journal of Heat and Mass Transfer
Volumen	95
DOI	https://doi.org/10.1016/j.ijheatmasstransfer.2015.12.004
Estado	Published - abr 1 2016

Nota bibliográfica

Publisher Copyright:
© 2015 Elsevier Ltd. All rights reserved.

Financiación

The authors gratefully acknowledge the support of B. Plaster regarding this work. Financial support was provided by Kentucky EPSCoR and NASA RA Award NNX13AN04A and NASA Award NNX14AI97G. Part of this work was also performed under the Entry System Modeling Project (M.J. Wright program manager) of the NASA Game Changing Development (GCD) Program. Finally, the authors are also indebted to T. Cochell for pointing out the published experimental data, K. Bensassi and A. Munafo for providing helpful comments, and J.F. Wenk for a very helpful conversation on principal axis.

Financiadores	Número del financiador
GCD
Kentucky Statewide EPSCoR
NASA Game Changing Development
National Aeronautics and Space Administration	NNX14AI97G, NNX13AN04A

ASJC Scopus subject areas

Condensed Matter Physics
Mechanical Engineering
Fluid Flow and Transfer Processes

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title = "Evaluation of the anisotropic radiative conductivity of a low-density carbon fiber material from realistic microscale imaging",

abstract = "The radiative heat transfer inside a low-density carbon fiber insulator is analyzed using a three-dimensional direct simulation model. A robust procedure is presented for the numerical calculation of the geometric configuration factor to compute the radiative energy exchange processes among the small discretized surface areas of the fibrous material. The methodology is applied to a polygonal mesh of a fibrous insulator obtained from three-dimensional microscale imaging of the real material. The anisotropic values of the radiative conductivity are calculated for that geometry. The results yield both directional and thermal dependence of the radiative conductivity. The combined value of radiative and solid conductivity are compared to experimental data available in the literature, and show excellent agreement.",

keywords = "Effective conductivity, Porous media, Radiative conductivity, Radiative heat transfer, Thermal Protection Systems",

author = "Nima Nouri and Francesco Panerai and Tagavi, \{Kaveh A.\} and Mansour, \{Nagi N.\} and Alexandre Martin",

year = "2016",

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language = "English",

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T1 - Evaluation of the anisotropic radiative conductivity of a low-density carbon fiber material from realistic microscale imaging

AU - Nouri, Nima

AU - Panerai, Francesco

AU - Tagavi, Kaveh A.

AU - Mansour, Nagi N.

AU - Martin, Alexandre

PY - 2016/4/1

Y1 - 2016/4/1

N2 - The radiative heat transfer inside a low-density carbon fiber insulator is analyzed using a three-dimensional direct simulation model. A robust procedure is presented for the numerical calculation of the geometric configuration factor to compute the radiative energy exchange processes among the small discretized surface areas of the fibrous material. The methodology is applied to a polygonal mesh of a fibrous insulator obtained from three-dimensional microscale imaging of the real material. The anisotropic values of the radiative conductivity are calculated for that geometry. The results yield both directional and thermal dependence of the radiative conductivity. The combined value of radiative and solid conductivity are compared to experimental data available in the literature, and show excellent agreement.

AB - The radiative heat transfer inside a low-density carbon fiber insulator is analyzed using a three-dimensional direct simulation model. A robust procedure is presented for the numerical calculation of the geometric configuration factor to compute the radiative energy exchange processes among the small discretized surface areas of the fibrous material. The methodology is applied to a polygonal mesh of a fibrous insulator obtained from three-dimensional microscale imaging of the real material. The anisotropic values of the radiative conductivity are calculated for that geometry. The results yield both directional and thermal dependence of the radiative conductivity. The combined value of radiative and solid conductivity are compared to experimental data available in the literature, and show excellent agreement.

KW - Effective conductivity

KW - Porous media

KW - Radiative conductivity

KW - Radiative heat transfer

KW - Thermal Protection Systems

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M3 - Article

AN - SCOPUS:84952360636

SN - 0017-9310

VL - 95

SP - 535

EP - 539

JO - International Journal of Heat and Mass Transfer

JF - International Journal of Heat and Mass Transfer

ER -

Evaluation of the anisotropic radiative conductivity of a low-density carbon fiber material from realistic microscale imaging

Resumen

Nota bibliográfica

Financiación

ASJC Scopus subject areas

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