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ENCIT 2018
Brazilian Congress of Thermal Sciences and Engineering
RADIATIVE TRANSFER PREDICTION IN PARTICIPATING MEDIUM BOUNDED WITH NONGRAY WALLS USING THE SLW MODEL
Submission Author:
Roger Mazurek da Silva , RS
Co-Authors:
Roberta Juliana Collet da Fonseca, Francis França
Presenter: Roger Mazurek da Silva
doi://10.26678/ABCM.ENCIT2018.CIT18-0834
Abstract
This study presents the application of the spectral line-based weighted-sum-of-gray-gases (SLW) model for the radiative transfer calculation in a participating medium bounded by two infinite, parallel and nongray walls. The proposed methodology presents a simplified approach to calculate the irradiation of the medium without the determination of the radiation intensity field at each wavenumber. The radiative transfer equation (RTE) is modeled in a one-dimensional domain in which there is a non-isothermal homogeneous or non-homogeneous gaseous mixture of water vapor and carbon dioxide. The results are compared with the line-by-line (LBL) benchmark solution in order to quantify the magnitude of the error when using the spectral model to describe the solution behavior. The results show that the applied methodology provides satisfactory agreements with respect to LBL solution. In addition, the importance of considering nongray walls, instead of gray, for an accurate computation of the radiative heat transfer is shown.
Keywords
radiative transfer, SLW Model, Nongray Walls, line-by-line solution
