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EFFECT OF FIBER ORIENTATION ON THERMAL RADIATION IN FIBROUS MEDIA.

Author(s) : LEE S. C.

Type of article: Article

Summary

A RADIATION MODEL IS DEVELOPED TO EVALUATE THE EFFECT OF FIBER ORIENTATION ON THE RADIATIVE HEAT TRANSFER THROUGH FIBROUS MEDIA BETWEEN PARALLEL PLANAR DIFFUSE BOUNDARIES. FIBERS IN THE MEDIUM CAN BE ORIENTED IN ANY GIVEN POLAR AND AZIMUTHAL DIRECTIONS. PERTINENT PARAMETERS IN THE MODEL ARE THEABSORPTION RATIO AND THE BACKSCATTER FACTOR, WHICH CHARACTERIZE THE EFFECT OF THE ABSORPTION COEFFICIENT AND THE AMOUNT OF BACK-SCATTERED RADIATION, RESPECTIVELY. THE ANALYSIS REVEALS THAT THE POLAR ORIENTATION OF THE FIBERS STRONGLY AFFECTS BOTH THE BACK-SCATTER FACTOR AND RADIATIVE HEAT TRANSFER. FOR FIBERS ORIENTED PARALLEL TO THE BOUNDARIES, BACKSCATTERING OF RADIATION IS HIGHEST WHICH RESULTS IN MINIMUM RADIATIVE HEAT TRANSFER. IF THE FIBERS ARE ORIENTED PERPENDICULAR TO THE BOUNDARIES, THERE IS NO BACKSCATTERING OF RADIATION.

Details

  • Original title: EFFECT OF FIBER ORIENTATION ON THERMAL RADIATION IN FIBROUS MEDIA.
  • Record ID : 1989-1747
  • Languages: English
  • Source: International Journal of Heat and Mass Transfer - vol. 32 - n. 2
  • Publication date: 1989

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