Solving 3-D Neutron Diffusion Equation with JFNK Algorithm
-
摘要: 采用有限差分方法将三维中子扩散方程离散为大型稀疏矩阵的广义特征值问题,并应用JFNK(Jacobian-Free Newton-Krylov)非线性求解方法对该问题进行求解,得到有效增殖因子(keff)和功率分布。数值结果表明,JFNK方法求解三维中子扩散方程具有良好的计算精度。Abstract: In this paper, 3-D neutron diffusion equation was discretized into the generalized eigenvalue problem of large sparse matrix with finite difference method. Then, keff and power distributation were obtained by nonlinear algorithm JFNK(Jacobian-Free Newton-Krylov). Numerical results demonstrated that JFNK algorithm could get high accuracy for 3-D neutron diffusion equation.
-
Key words:
- Neutron diffusion equation /
- Finite difference /
- JFNK algorithm
-
计量
- 文章访问数: 15
- HTML全文浏览量: 9
- PDF下载量: 0
- 被引次数: 0