RAPID OPTIMAL SPH PARTICLE DISTRIBUTIONS IN SPHERICAL GEOMETRIES FOR CREATING ASTROPHYSICAL INITIAL CONDITIONS
RAPID OPTIMAL SPH PARTICLE DISTRIBUTIONS IN SPHERICAL GEOMETRIES FOR CREATING ASTROPHYSICAL INITIAL CONDITIONS
复制标题
用于创建天体物理初始条件的球形几何形状中的快速最佳 SPH 粒子分布
DOI：
10.3847/0004-637x/820/2/102
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发表时间：
2016
期刊：
影响因子：
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通讯作者：
J. Owen
中科院分区：
文献类型：
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作者：
C. Raskin;J. Owen
在光滑粒子流体动力学模拟中，创建球形共形的球形初始条件是一项困难的任务。在这里，我们描述了两种算法方法，用于在表面上均匀分布点，当配对时，可以用于构建三维球形物体，粒子之间具有最佳的体积均分，与任意的径向密度函数相称。我们证明了我们的方法对拉伸晶格安排的水动力稳定性，球形一致性，和重力沉降振荡的谐波功率分布的度量的功效。我们进一步展示了我们的方法是如何高度优化模拟多物质球体，如行星与核幔边界。
Creating spherical initial conditions in smoothed particle hydrodynamics simulations that are spherically conformal is a difficult task. Here, we describe two algorithmic methods for evenly distributing points on surfaces that when paired can be used to build three-dimensional spherical objects with optimal equipartition of volume between particles, commensurate with an arbitrary radial density function. We demonstrate the efficacy of our method against stretched lattice arrangements on the metrics of hydrodynamic stability, spherical conformity, and the harmonic power distribution of gravitational settling oscillations. We further demonstrate how our method is highly optimized for simulating multi-material spheres, such as planets with core–mantle boundaries.