## ALTERNATIVE FORMULATIONS

**Following from: **
Discrete ordinates and finite volume methods

The discrete ordinates method (DOM) and the finite volume method (FVM) have been described in the article “Mathematical formulation”. In the FVM, both the spatial and the angular discretization are carried out using the finite volume method (Ferziger and Peric, 2002). In the DOM, the name “discrete ordinates” refers to the angular discretization procedure, the spatial formulation being generally carried out using the FVM. However, other spatial discretization methods are possible, while maintaining the discrete ordinates angular discretization. These alternative formulations of the DOM are addressed in this article, except the so-called modified discrete ordinates method, which will be described in the article “Modified discrete ordinates and finite volume methods”. However, we will fi ...

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