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Application to nongray media

DOI: 10.1615/thermopedia.009178


APPLICATION TO NONGRAY MEDIA

Following from: Discrete ordinates and finite volume methods

The application of the discrete ordinates method (DOM) and the finite volume method (FVM) to nongray gaseous media, with or without particles, is described in this article. The formulation depends on the model used to calculate the radiative properties of the gaseous medium. The radiative properties of molecular gases are a strong function of wave number, while the radiative properties of particles, although also being dependent on the wave number, are much smoother. As a consequence, the particles in gas-particle media are often treated as gray within a band, in contrast to the gases. Then, the absorption coefficient of the particles is added to that of the gaseous mixture.

Line-by-Line method

The most accurate method to calculate the radiative properties of gases is the lin ...

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