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RESEARCH PAPERS: Radiative Transfer

Comparison of Experiment With Monte Carlo Simulations on a Reflective Gap Using a Detailed Surface Properties Model

[+] Author and Article Information
J. Zaworski, J. R. Welty

Department of Mechanical Engineering, Oregon State University, Corvallis, OR 97331

B. J. Palmer, M. K. Drost

Pacific Northwest Laboratory, Richland, WA 99352

J. Heat Transfer 118(2), 388-393 (May 01, 1996) (6 pages) doi:10.1115/1.2825856 History: Received August 01, 1995; Revised January 01, 1996; Online December 05, 2007

Abstract

The spatial distribution of light through a rectangular gap bounded by highly reflective, diffuse surfaces was measured and compared with the results of Monte Carlo simulations. Incorporating radiant properties for real surfaces into a Monte Carlo code was seen to be a significant problem; a number of techniques for accomplishing this are discussed. Independent results are reported for measured values of the bidirectional reflectance distribution function over incident polar angles from 0 to 90 deg for a semidiffuse surface treatment (Krylon™ flat white spray paint). The inclusion of this information into a Monte Carlo simulation yielded various levels of agreement with experimental results. The poorest agreement occurred when the incident radiation was at a grazing angle with respect to the surface and the reflectance was nearly specular.

Copyright © 1996 by The American Society of Mechanical Engineers
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