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ISSN Online: 2377-424X

ISBN Print: 0-85295-345-3

International Heat Transfer Conference 10
August, 14-18, 1994, Brighton, UK

k-DISTRIBUTIONS AND WEIGHTED-SUM-OF-GRAY-GASES-A HYBRID MODEL

Get access (open in a dialog) DOI: 10.1615/IHTC10.4890
pages 19-24

Resumo

The weighted-sum-of-gray-gases (WSGG) model is shown to be related to k-distributions resulting in a hybrid approach that draws on the strengths of the each model. The WSGG weights are related to the cumulative k-distributions through an integration of Planck's function over wave number weighted by the cumulative k-distributions. This allows a single quadrature over the absorption cross-section (k-space) of each arbitrarily large band to account for non-gray boundaries or particulates. Predictions from the hybrid model compare well with line-by-line benchmarks.