SimpleX2: radiative transfer on an unstructured, dynamic grid
SimpleX2: radiative transfer on an unstructured, dynamic grid
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SimpleX2：非结构化动态网格上的辐射传输
DOI：
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发表时间：
2009
期刊：
影响因子：
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通讯作者：
V. Icke
中科院分区：
文献类型：
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作者：
J. Paardekooper;C. Kruip;V. Icke
上下文我们提出了一个改进版本的SimpleX方法的辐射传输的非结构化Delaunay网格。网格采样介质，光子通过该介质以最佳方式传输，用于快速辐射传输计算。目标。我们研究了SimpleX在测试问题中的详细工作，并显示了对以前版本的方法的改进。方法.我们已经应用了一个方向守恒的传输方案，正确地传输光子在光学薄制度，制度，原来的SimpleX算法失去了它的准确性。此外，动态网格更新的计划，以确保正确的光子输运时的光学深度变化在模拟过程中。对于大型数据集的应用，该方法是并行的分布式内存机器使用MPI。结果为了测试新方法，我们已经进行了宇宙辐射传输的标准测试。我们表现出良好的对应关系的分析解决方案（可用时）和其他代码的结果相比，以前版本的SimpleX，而不牺牲的高计算速度的方法的好处。
Context. We present an improved version of the SimpleX method for radiative transfer on an unstructured Delaunay grid. The grid samples the medium through which photons are transported in an optimal way for fast radiative transfer calculations. Aims. We study the detailed working of SimpleX in test problems and show improvements over the previous version of the method. Methods. We have applied a direction conserving transport scheme that correctly transports photons in the optically thin regime, a regime where the original SimpleX algorithm lost its accuracy. In addition, a scheme of dynamic grid updates is employed to ensure correct photon transport when the optical depth changes during a simulation. For the application to large data sets, the method is parallellised for distributed memory machines using MPI. Results. To test the new method, we have performed standard tests for cosmological radiative transfer. We show excellent correspondence with both the analytical solution (when available) and to the results of other codes compared to the former version of SimpleX, without sacrificing the benefits of the high computational speed of the method.
DOI：
10.1111/j.1365-2966.2008.14197.x
发表时间：
2008-11
影响因子：
4.8
作者：
Antonella Maselli;B. Ciardi;A. Kanekar
通讯作者：
Antonella Maselli;B. Ciardi;A. Kanekar