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

Research output: Contribution to journalArticlepeer-review

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.

Original languageEnglish (US)
Pages (from-to)535-539
Number of pages5
JournalInternational Journal of Heat and Mass Transfer
Volume95
DOIs
StatePublished - Apr 1 2016
Externally publishedYes

Keywords

  • Effective conductivity
  • Porous media
  • Radiative conductivity
  • Radiative heat transfer
  • Thermal Protection Systems

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Mechanical Engineering
  • Fluid Flow and Transfer Processes

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