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Dependent Scattering and Field Enhancement in Monochromatic Irradiated, Random Porous Media

[+] Author Affiliations
X. L. Ruan, M. Kaviany

University of Michigan, Ann Arbor, MI

Paper No. HT2003-47233, pp. 339-346; 8 pages
  • ASME 2003 Heat Transfer Summer Conference
  • Heat Transfer: Volume 1
  • Las Vegas, Nevada, USA, July 21–23, 2003
  • Conference Sponsors: Heat Transfer Division
  • ISBN: 0-7918-3693-2 | eISBN: 0-7918-3679-7
  • Copyright © 2003 by ASME


Solving the Maxwell’s equations, an electric filed enhancement is observed in monochromatically irradiated, one- and two-dimensional dispersed dielectric solids with random size distribution. This enhancement is a few orders of magnitude higher than the incident field, for some arrangements. The probability density and the location of enhanced field are determined forgiven solid complex refractive index and particle size distribution. Using the two-flux model, the equation of radiative heat transfer (ERT) is solved for the local intensity. It is shown that ERT can represent a statistical average behavior of the intensity (by introducing corrections to the scattering and absorption coefficients based on dependent scattering). However, ERT is not suitable for predicting field enhancement and photon localization.

Copyright © 2003 by ASME



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