论文标题
有效平滑颗粒辐射流体动力学II：辐射流体动力学
Efficient smoothed particle radiation hydrodynamics II: Radiation hydrodynamics
论文作者
论文摘要
平滑颗粒流体动力学的辐射流体动力学方程是通过将辐射和流体动力学项分解的，包括材料运动的必要条款，并在时间和空间中分别分别分别分别将每个方程组合。本系列第一篇论文中讨论的隐式辐射转移与明确平滑的粒子流体动力学结合。结果是具有任意不相处和状态方程的多物质无网状辐射流体动力学代码，对于具有重大材料运动的问题表现良好。该代码以空间的二阶精度和一阶准确度收敛到低点辐射冲击问题的半分析解决方案，并且与基于网格的辐射流体动力学代码相比具有竞争性能，以在二维中出现多物质问题，并且在两层和三个维度的惯性限制融合中启发的多物质问题。
The radiation hydrodynamics equations for smoothed particle hydrodynamics are derived by operator splitting the radiation and hydrodynamics terms, including necessary terms for material motion, and discretizing each of the sets of equations separately in time and space. The implicit radiative transfer discussed in the first paper of this series is coupled to explicit smoothed particle hydrodynamics. The result is a multi-material meshless radiation hydrodynamics code with arbitrary opacities and equations of state that performs well for problems with significant material motion. The code converges with second-order accuracy in space and first-order accuracy in time to the semianalytic solution for the Lowrie radiative shock problem and has competitive performance compared to a mesh-based radiation hydrodynamics code for a multi-material problem in two dimensions and an ablation problem inspired by inertial confinement fusion in two and three dimensions.
