论文标题
使用基于碰撞的混合方法的多组中子传输
Multigroup Neutron Transport using a Collision-Based Hybrid Method
论文作者
论文摘要
基于碰撞的混合算法，用于中子传输方程的离散列表近似值扩展到多组设置。该算法在两种不同的分辨率下使用离散的能量和角度网格，并近似于粗网格上的裂变和散射源。在粗网格上离散的碰撞传输方程的耦合，并带有未填充的传输方程，在细网格上放置，产生了一种算法，在大多数情况下，该算法比传统的多群方法更有效。对于不同材料，几何形状和能量群体的时间依赖性问题，证明了对现有技术的改进。
A collision-based hybrid algorithm for the discrete ordinates approximation of the neutron transport equation is extended to the multigroup setting. The algorithm uses discrete energy and angle grids at two different resolutions and approximates the fission and scattering sources on the coarser grids. The coupling of a collided transport equation, discretized on the coarse grid, with an uncollided transport equation, discretized on the fine grid, yields an algorithm that, in most cases, is more efficient than the traditional multigroup approach. The improvement over existing techniques is demonstrated for time-dependent problems with different materials, geometries, and energy groups.
