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Extension of the MCRT Method to Non-Diffuse, Non-Gray Enclosures

Excerpt

The assumption of diffuse emission and diffuse-specular reflection in gray enclosures is adequate for many applications encountered in engineering practice. This is especially true in the conceptual and preliminary design stages. However, final design and performance studies often require the use of bidirectional surface optical models restricted to a specified wavelength interval. In this chapter we develop the concept of the band-averaged spectral radiation distribution factor, which is the most general tool available for treating radiant exchange among surfaces, but first we learn through extended examples how to compose and use models to simulate the optical behavior of non-diffuse surfaces.

4.1Bidirectional Spectral Surfaces
4.2Principles Underlying a Practical Bidirectional Reflection Model
4.3First Example: A Highly Absorptive Surface Whose Reflectivity is Strongly Specular
4.4Second Example: A Highly Reflective Surface Whose Reflectivity is Strongly Diffuse
4.5The Band-Averaged Spectral Radiation Distribution Factor
4.6Use of the Band-Averaged Spectral Radiation Distribution Factor for the Case of Specified Surface Temperatures
4.7Use of the Band-Averaged Spectral Radiation Distribution Factor for the Case of One or More Specified Surface Net Heat Fluxes
Problems
References

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