arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2001.11608physics.comp-ph
收藏

高效光滑粒子辐射流体力学II:辐射流体力学

Efficient smoothed particle radiation hydrodynamics II: Radiation hydrodynamics

Brody R. Bassett, J. Michael Owen, Thomas A. Brunner

摘要:

通过算子分裂辐射和流体力学项,包括物质运动的必要项,并在时间和空间上分别离散方程组,导出了光滑粒子流体动力学的辐射流体动力学方程。在本系列的第一篇论文中讨论的隐式辐射转移耦合到显式光滑粒子流体动力学。其结果是一个多材料无网格辐射流体动力学代码与任意的不透明度和状态方程,表现良好的问题与显着的材料运动。该代码收敛与二阶精度在空间和一阶精度在时间上的Lowrie辐射冲击问题的半解析解,并具有竞争力的性能相比,基于网格的辐射流体力学代码的多材料问题在二维和三维的消融问题的启发惯性约束聚变。

英文摘要:

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.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑