RAGE辐射流体动力学程序
The RAGE radiation-hydrodynamic code
摘要：
我们描述了“辐射自适应网格欧拉”辐射流体动力学代码，包括它的数据结构，它的并行化策略和性能，它的流体动力学算法（S），它的（灰色）辐射扩散算法，以及一些相当数量的验证和确认工作。流体动力学是一个基本的Goddom求解器，我们已经取得了显着的改进，以增加平流算法的鲁棒性和收敛刚度的状态方程。类似地，辐射输运是基本的灰色扩散，但是我们对辐射-材料耦合的处理，其中我们以新颖的方式收敛非线性以允许更大的时间步长和更鲁棒的行为，可以应用于任何多组输运算法。
英文摘要：
We describe RAGE, the ``Radiation Adaptive Grid Eulerian'' radiation-hydrodynamics code, including its data structures, its parallelization strategy and performance, its hydrodynamic algorithm(s), its (gray) radiation diffusion algorithm, and some of the considerable amount of verification and validation efforts. The hydrodynamics is a basic Godunov solver, to which we have made significant improvements to increase the advection algorithm's robustness and to converge stiffnesses in the equation of state. Similarly, the radiation transport is a basic gray diffusion, but our treatment of the radiation-material coupling, wherein we converge nonlinearities in a novel manner to allow larger timesteps and more robust behavior, can be applied to any multi-group transport algorithm.
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