复杂几何中子输运方程离散方向概率方法研究

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基金项目:

国家自然科学基金项目(10875094)

Discrete Direction Probability Method for Solving Neutron Transport Equation in Complex Geometry

School of Energy and Power Engineering, Xi'An Jiaotong University, Xi'An, 710049, China

摘要: 研究了一种可以在复杂几何条件下求解中子输运方程的离散方向概率方法(DDPM)。该方法对角度变量沿离散点离散,在计算系统的某个区域内进行平行线追踪,具备可与特征线方法比拟的处理复杂几何的能力;在某个离散方向上,区域内的子区间用碰撞概率方法耦合,区域和区域之间用穿透概率方法耦合。数值检验结果表明,DDPM方法具有较好的精度和速度。
- 离散方向概率方法 /
- 复杂几何 /
- 中子输运
Abstract: For solving the neutron transport equation in complex geometry,the discrete direction probability method（DDPM） is developed.In the DDPM,the calculation system is divided into subsystems which can be subdivided into fine meshes.The ray tracing is done for each type of subsystem.Within a subsystem,fine meshes are coupled by the discrete direction collision probability,while subsystems are coupled by the discrete direction transmission probability.The numerical results demonstrate the high efficiency and accuracy of this method.
- Discrete direction probability method /
- Complex geometry /
- Neutron transport