Application of the Spectrally Reduced Integration Method to Solve Radiative Transfer in Multidimensional Non-Homogeneous Participating Media

Document Type

Article

Publication Date

8-2025

Publisher

Elsevier

Source Publication

Internal Communications in Heat and Mass Transfer

Source ISSN

0753-1933

Original Item ID

DOI: 10.1016/j.icheatmasstransfer.2025.109061

Abstract

In this study, the accuracy of the spectrally reduced integration (SRI) method was evaluated in multidimensional radiative transfer problems considering non-homogeneous participating media that replicate typical air- and oxy–fuel combustion scenarios. The SRI is a methodology capable of generating benchmark solutions for thermal radiative transfer in gas mixtures several times faster than the more commonly employed line-by-line (LBL) calculations. Even though it displayed promising results in previous studies, the SRI had yet to be tested in both two- and three-dimensional configurations. Thus, the methodology was extended here to multidimensional problems and its solutions were compared to the reference LBL method for six test cases that represent both air- and oxy–fuel applications. The results of this comparison showed that — for all the studied test cases — the average deviations between the SRI and the LBL were lower than 0.5%. Moreover, one of the core methodologies of the SRI was even more advantageous when dealing with three-dimensional configurations. Therefore, it was concluded that the SRI — similar to what was previously reported for one-dimensional configurations — is also capable of producing benchmark solutions several times faster than the LBL method in more complex multidimensional problems.

Comments

Internal Communications in Heat and Mass Transfer, Vol. 166 (August 2025). DOI.

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