Home / Store / Journals / Electronic Articles / Nuclear Science and Engineering / Volume 105 / Number 1
J. E. Morel, Edward W. Larsen
Nuclear Science and Engineering
Volume 105 / Number 1 / May 1990 / Pages 1-15
Format:electronic copy (download)
A new and promising approach for differencing the Sn equations is introduced. This scheme is characterized by the use of the standard balance equation for each discrete phase-space cell together with auxiliary equations that represent approximate balance equations over subregions of the cell. Hence, it is called the “multiple balance” approach. In principle, the multiple balance approach can be applied to the Sn equations in any geometry with general anisotropic scattering. However, the multiple balance approach is applied only to the one-dimensional slab-geometry Sn equations with isotropic scattering. This represents a first step toward applications of this approach in more general contexts. The results are very encouraging. A multiple balance scheme that has several highly desirable properties, which are collectively unique, has been developed. These properties are demonstrated both theoretically and computationally.
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