Radiation hydrodynamics including irradiation and adaptive mesh refinement with AZEuS. I. Methods
Radiation hydrodynamics including irradiation and adaptive mesh refinement with AZEuS. I. Methods
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DOI：
10.1051/0004-6361/201424954
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发表时间：
2014-09
期刊：
影响因子：
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通讯作者：
J. Ramsey;C. Dullemond
中科院分区：
文献类型：
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作者：
J. Ramsey;C. Dullemond
目标。辐射对原行星盘物理结构的重要性不能低估。然而，原行星盘随着时间的推移而演变，因此要了解盘的演变和关联，盘的结构，应该解决辐射流体动力学的组合和时间相关的方程。方法.我们实现了一个新的隐式辐射求解器在AZEuS自适应网格细化磁流体动力学流体代码。基于将恒星辐射的频率相关射线追踪与非平衡通量限制扩散相结合的混合方法，我们在保持恒星辐射方向性的同时求解辐射流体力学方程。该实现允许在笛卡尔坐标、圆柱坐标和球面坐标中，在均匀网格和自适应网格上进行模拟。结果我们提出了几个流体静力学和流体动力学的辐射测试，验证我们的实施统一和自适应网格适当的，包括专门为原行星盘设计的基准。我们的研究结果表明，AZEuS的混合辐射算法的组合是一个有效的工具，辐射流体动力学研究，并产生的结果是具有竞争力的其他天体物理辐射流体动力学代码。
Aims. The importance of radiation to the physical structure of protoplanetary disks cannot be understated. However, protoplanetary disks evolve with time, and so to understand disk evolution and by association, disk structure, one should solve the combined and time-dependent equations of radiation hydrodynamics. Methods. We implement a new implicit radiation solver in the AZEuS adaptive mesh refinement magnetohydrodynamics fluid code. Based on a hybrid approach that combines frequency-dependent ray-tracing for stellar irradiation with non-equilibrium flux limited diffusion, we solve the equations of radiation hydrodynamics while preserving the directionality of the stellar irradiation. The implementation permits simulations in Cartesian, cylindrical, and spherical coordinates, on both uniform and adaptive grids. Results. We present several hydrostatic and hydrodynamic radiation tests which validate our implementation on uniform and adaptive grids as appropriate, including benchmarks specifically designed for protoplanetary disks. Our results demonstrate that the combination of a hybrid radiation algorithm with AZEuS is an effective tool for radiation hydrodynamics studies, and produces results which are competitive with other astrophysical radiation hydrodynamics codes.