从一阶中子输运方程出发。对方向变量采用离散纵标法展开,得到一系列关于空间变量的偏微分方程,对这些方程采用最小二乘有限元方法进行离散。编制了二维中子输运方程的非结构网格离散纵标计算程序。对一系列基准问题做了验算,计算结果表明,该方法能用于非结构网格,并具有较高的计算精度。
A discrete ordinates method for two-dimensional neutron transport equation based on unstructured-meshes is derived from the first order neutron transport equation. A set of differential equations about the spatial variables can be obtained. They are solved iteratively by using the least-squares finite element method. A two-dimensional transport calculation code is encoded. The numerical results of some benchmark problems .demonstrate that this method can be used in unstructured-meshes and can give high precision result.