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ENCIT 2020
18th Brazilian Congress of Thermal Sciences and Engineering
Comparison of GG and WSGG Models for Gas and Soot Radiation in Coupled Pool Fire Simulations
Submission Author:
Felipe Silva , RS
Co-Authors:
Felipe Silva, Guilherme Crivelli Fraga, Felipe Roman Centeno
Presenter: Felipe Silva
doi://10.26678/ABCM.ENCIT2020.CIT20-0534
Abstract
Fully-coupled large eddy simulations of a 30 cm×30 cm square-shaped ethanol pool fire are carried out with the purpose of comparing different spectral models for the treatment of the radiative transfer. Both the gray gas (GG) model and the non-gray weighted-sum-of-gray-gases (WSGG) model are considered. At the moment, two calculations with the gray gas model (one considering soot radiation and the other neglecting it) and another with the WSGG have been carried out, but the aim is to include other WSGG formulations in the final paper. The preliminary results show that the two GG solutions are much closer to each other than to the WSGG model, signaling that the gas radiation has considerably more importance than the soot radiation (that displays a near-gray spectral behavior) for the flame under study.
Keywords
thermal radiation, pool fires, weighted-sum-of-gray-gases model, gray gas model
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