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ENCIT 2020
18th Brazilian Congress of Thermal Sciences and Engineering
Evaluation of the accuracy of the SRI method in non-homogeneous conditions
Submission Author:
Felipe Ramos Coelho , SP
Co-Authors:
Felipe Ramos Coelho, Francis França, Somesh Roy
Presenter: Felipe Ramos Coelho
doi://10.26678/ABCM.ENCIT2020.CIT20-0391
Abstract
This study evaluates the ability of the spectrally reduced integration (SRI) method to generate benchmark solutions for the radiative transfer equation (RTE) in non-homogeneous participating gas mixtures of H2O and CO2 . The SRI employs a non-uniform spectral mesh that is generated from discretization schemes based on the spectral contributions of the bands. This allows the method to be significantly less computationally costly than the reference line-by-line (LBL) while still retaining good levels of accuracy. New discretization schemes are developed and compared to the most accurate alternatives available in the literature in several different non-homogeneous test cases. The main goal of this comparison is to investigate whether the SRI is still able to generate benchmark levels of accuracy when the problem that is being solved is considerably different than the conditions for which the discretization schemes were developed. In this sense, the newly proposed schemes are supposed to be alternatives that could be more easily generalized for a broader range of applications. Furthermore, spectral contributions databases are generated for various values of mole ratio between H2O and CO2 . For intermediate values of mole ratio, an interpolation methodology of the spectral contributions databases is also proposed and evaluated in the present study.
Keywords
radiative transfer, Spectrally reduced integration, line-by-line, Discretization Schemes, Spectral contributions of the bands
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