论文标题
耦合的中子电击物理求解器：SN中子传输模块的实现
A coupled neutronics shock physics solver: implementation of an SN neutron transport module
论文作者
论文摘要
多物理学有限体积方法（FVM）求解器（中性次数和休克物理学）正在PoliteCnico di Milano中开发，用于分析冲击爆内裂变材料的分析[1]。所提出的求解器可以是对亚临界plut型实验进行初步安全评估[2]的有用工具[2]，并且通常，在涉及裂变材料的强烈能量事件（例如化学爆炸）的情况下，进行了关键的安全性评估[3]。为此，多组SP3中子传输模型与流体动力休克物理模型相结合[4]，适合描述实心材料中强的冲击波的传播。冲击物理模块实现动态网格以重现材料变形，其管理方程式以任意的拉格朗日欧拉（ALE）配方编写，以在发生较大扭曲的情况下保留网格质量。
A multiphysics finite volume method (FVM) solver, coupling neutronics and shock physics, is under development at Politecnico di Milano for the analysis of shock imploding fissile materials [1]. The proposed solver can be a useful tool to make preliminary safety assessment of subcritical plutonium experiments [2] and, more in general, to perform criticality safety evaluations in case of strongly energetic events (such as chemical explosions) involving fissile materials [3]. To this aim, a multi-group SP3 neutron transport model is coupled with a hydrodynamic shock physics model [4], suitable to describe the propagation of strong shockwaves in solid materials. The shock physics module implements a dynamic mesh to reproduce material deformations and its governing equations are written in an Arbitrary Lagrangian Eulerian (ALE) formulation to preserve the mesh quality in case of large distortions.
