The Generalized SLW Model

Eurotherm Conference 105: Computational Thermal Radiation in Participating Media V

物理学;计算机科学

Solovjov, Vladimir P.^1 ; Andre, Frédéric^2 ; Lemonnier, Denis^3 ; Webb, Brent W.^1

Brigham Young University, CTB-435, Provo

UT

84602, United States^1

Centre de Thermique et d'Energétique de Lyon, INSA de Lyon, 9 rue de la Physique, Villeurbanne

69621, France^2

ISAE-ENSMA, BP 40109, Futuroscope Chasseneuil Cedex

86961, France^3

关键词: Absorption cross sections;    Dual formulations;    Efficient implementation;    Implicit equation;    Inverse formulation;    Plane-parallel media;    Spectral modeling;    Unified construction;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/676/1/012022/pdf
DOI  :  10.1088/1742-6596/676/1/012022

学科分类：计算机科学（综合）

来源: IOP

【 摘 要 】

The Generalized SLW Method is presented, formulating the SLW method with the help of both the ALBDF and the Inverse ALBDF. The result is two equivalent symmetric models: the SLW Model and the Inverse SLW Model. The advantage of the unified dual formulation and of application of the ALBDF and the Inverse ALBDF is in more efficient implementation of the model and the elimination of the solution of the implicit equations for the absorption cross-sections in the construction of the spectral model in the case of nonisothermal media. The generalized approach explores all possibilities of the SLW method under both direct and inverse formulations including its limiting cases: the minimal one clear gas-one gray gas SLW-1 model, and the case when the number of gray gases approaches infinity termed the Exact SLW model. The present work outlines the steps in a unified construction of the generalized SLW model in isothermal and non-isothermal media, and compares different forms of the modelled radiative quantities in plane parallel media: directional total radiative flux, total emissivity, Planck mean and Rosseland mean absorption coefficients.