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IDENTIFICATION OF APPROPRIATE SOURCE MODELS FOR ACCURATE DIFFUSION MODELING OF RADIATIVE TRANSFER IN A NON-ABSORBING FOAM LAYER

DOI: 10.1615/ICHMT.2004.RAD-4.140
10 pages

Matthew R. Jones
Department of Mechanical Engineering, Brigham Young University, Provo UT 84602

Vladimir P. Solovjov
Brigham Young University, Dept. of Mechanical Engineering, CTB435, Provo, UT 84602, USA

Brent W. Webb
Brigham Young University, Dept. of Mechanical Engineering, CTB435, Provo, UT 84602, USA

Shaun M. Salisbury
Department of Mechanical Engineering Brigham Young University, Provo, UT 84602-4201, USA

Abstract

The diffusion approximation is used to model the propagation of radiation scattered from a pulsed laser beam incident on a non-absorbing foam layer. Various mathematical models for the source term are considered, and integral transforms are used to solve the diffusion approximation. Comparison of the calculated reflectance profiles with the results of Monte Carlo simulations indicates that use of detailed source models leads to improved results. Diffusion theory source models which provide accurate predictions for radiative transfer and the limits on their accuracy are identified.

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