2021
DOI: 10.48550/arxiv.2102.09054
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Multilevel Second-Moment Methods with Group Decomposition for Multigroup Transport Problems

Dmitriy Y. Anistratov,
Joseph M. Coale,
James S. Warsa
et al.

Abstract: This paper presents multilevel iterative schemes for solving the multigroup Boltzmann transport equations (BTEs) with parallel calculation of group equations. They are formulated with multigroup and grey low-order equations of the Second-Moment (SM) method. The group high-order BTEs and low-order SM (LOSM) equations are solved in parallel. To further improve convergence and increase computational efficiency of algorithms Anderson acceleration is applied to inner iterations for solving the system of multigroup … Show more

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