EXPANSION TECHNIQUES FOR COLLISIONLESS STELLAR DYNAMICAL SIMULATIONS
文献类型：期刊论文
| 作者 | Meiron, Yohai1; Li, Baile2; Holley-Bockelmann, Kelly2,3; Spurzem, Rainer1,4,5
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| 刊名 | ASTROPHYSICAL JOURNAL
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| 出版日期 | 2014-09-10 |
| 卷号 | 792期号:2 |
| 关键词 | stars: kinematics and dynamics |
| 英文摘要 | We present graphics processing unit (GPU) implementations of two fast force calculation methods based on series expansions of the Poisson equation. One method is the self-consistent field (SCF) method, which is a Fourier-like expansion of the density field in some basis set; the other method is the multipole expansion (MEX) method, which is a Taylor-like expansion of the Green's function. MEX, which has been advocated in the past, has not gained as much popularity as SCF. Both are particle-field methods and optimized for collisionless galactic dynamics, but while SCF is a "pure" expansion, MEX is an expansion in just the angular part; thus, MEX is capable of capturing radial structure easily, while SCF needs a large number of radial terms. We show that despite the expansion bias, these methods are more accurate than direct techniques for the same number of particles. The performance of our GPU code, which we call ETICS, is profiled and compared to a CPU implementation. On the tested GPU hardware, a full force calculation for one million particles took similar to 0.1 s (depending on expansion cutoff), making simulations with as many as 10(8) particles fast for a comparatively small number of nodes. |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000341172200016 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/6461]  |
| 专题 | 国家天文台_星系宇宙学研究部 |
| 作者单位 | 1.Peking Univ, Kavli Inst Astron & Astrophys, Beijing 100871, Peoples R China 2.Vanderbilt Univ, Dept Phys & Astron, Nashville, TN 37235 USA 3.Fisk Univ, Dept Phys, Nashville, TN 37208 USA 4.Chinese Acad Sci, Natl Astron Observ China, Beijing 100012, Peoples R China 5.Heidelberg Univ, Zentrum Astron, Astron Rech Inst, D-69120 Heidelberg, Germany |
| 推荐引用方式 GB/T 7714 | Meiron, Yohai,Li, Baile,Holley-Bockelmann, Kelly,et al. EXPANSION TECHNIQUES FOR COLLISIONLESS STELLAR DYNAMICAL SIMULATIONS[J]. ASTROPHYSICAL JOURNAL,2014,792(2). |
| APA | Meiron, Yohai,Li, Baile,Holley-Bockelmann, Kelly,&Spurzem, Rainer.(2014).EXPANSION TECHNIQUES FOR COLLISIONLESS STELLAR DYNAMICAL SIMULATIONS.ASTROPHYSICAL JOURNAL,792(2). |
| MLA | Meiron, Yohai,et al."EXPANSION TECHNIQUES FOR COLLISIONLESS STELLAR DYNAMICAL SIMULATIONS".ASTROPHYSICAL JOURNAL 792.2(2014). |
入库方式： OAI收割
来源：国家天文台
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