# A Multigrid Algorithm for Solving the Multi-group, Anisotropic Scattering Boltzmann Equation Using First-order System Least-squares Methodology

@inproceedings{ChangAMA, title={A Multigrid Algorithm for Solving the Multi-group, Anisotropic Scattering Boltzmann Equation Using First-order System Least-squares Methodology}, author={Britton Chang and Byeoncheol Lee} }

This paper describes a multilevel algorithm for solving the multi-group, anisotropic scattering Boltzmann equation formulated with a first-order system least-squares methodology. A Pn − h finite element discretization is used. The resulting angle discretization of this Pn approach does not exhibit the so-called “ray effects,” but this discretization leads to a large coupled system of partial differential equations for the spatial coefficients, and, on scaling the system to achieve better… CONTINUE READING

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