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A hybrid Fast Multipole Method for cosmological N-body simulations
Wang, Qiao
2021
Source PublicationRESEARCH IN ASTRONOMY AND ASTROPHYSICS
ISSN1674-4527
Volume21Issue:1Pages:8
AbstractWe investigate a hybrid numerical algorithm aimed at large-scale cosmological N-body simulation for on-going and future high precision sky surveys. It makes use of a truncated Fast Multiple Method (FMM) for short-range gravity, incorporating a Particle Mesh (PM) method for long-range potential, which is applied to deal with extremely large particle number. In this work, we present a specific strategy to modify a conventional FMM by a Gaussian shaped factor and provide quantitative expressions for the interaction kernels between multipole expansions. Moreover, a proper Multipole Acceptance Criterion for the hybrid method is introduced to solve potential precision loss induced by the truncation. Such procedures reduce the amount of computation compared to an original FMM and decouple the global communication. A simplified version of code is introduced to verify the hybrid algorithm, accuracy and parallel implementation.
Keywordmethods: numerical cosmology: theory large-scale structure of universe
Funding OrganizationNational Key Program for Science and Technology Research and Development ; National Key Program for Science and Technology Research and Development ; Strategic Priority Research Program of Chinese Academy of Sciences ; Strategic Priority Research Program of Chinese Academy of Sciences ; National Key Program for Science and Technology Research and Development ; National Key Program for Science and Technology Research and Development ; Strategic Priority Research Program of Chinese Academy of Sciences ; Strategic Priority Research Program of Chinese Academy of Sciences ; National Key Program for Science and Technology Research and Development ; National Key Program for Science and Technology Research and Development ; Strategic Priority Research Program of Chinese Academy of Sciences ; Strategic Priority Research Program of Chinese Academy of Sciences ; National Key Program for Science and Technology Research and Development ; National Key Program for Science and Technology Research and Development ; Strategic Priority Research Program of Chinese Academy of Sciences ; Strategic Priority Research Program of Chinese Academy of Sciences
DOI10.1088/1674-4527/21/1/3
Language英语
Funding ProjectNational Key Program for Science and Technology Research and Development[2017YFB0203300] ; Strategic Priority Research Program of Chinese Academy of Sciences[XDC01040100]
Funding OrganizationNational Key Program for Science and Technology Research and Development ; National Key Program for Science and Technology Research and Development ; Strategic Priority Research Program of Chinese Academy of Sciences ; Strategic Priority Research Program of Chinese Academy of Sciences ; National Key Program for Science and Technology Research and Development ; National Key Program for Science and Technology Research and Development ; Strategic Priority Research Program of Chinese Academy of Sciences ; Strategic Priority Research Program of Chinese Academy of Sciences ; National Key Program for Science and Technology Research and Development ; National Key Program for Science and Technology Research and Development ; Strategic Priority Research Program of Chinese Academy of Sciences ; Strategic Priority Research Program of Chinese Academy of Sciences ; National Key Program for Science and Technology Research and Development ; National Key Program for Science and Technology Research and Development ; Strategic Priority Research Program of Chinese Academy of Sciences ; Strategic Priority Research Program of Chinese Academy of Sciences
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000616093300001
PublisherNATL ASTRONOMICAL OBSERVATORIES, CHIN ACAD SCIENCES
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Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/79655
Collection中国科学院国家天文台
Corresponding AuthorWang, Qiao
AffiliationChinese Acad Sci, Natl Astron Observ, Key Lab Computat Astrophys, Beijing 100101, Peoples R China
Recommended Citation
GB/T 7714
Wang, Qiao. A hybrid Fast Multipole Method for cosmological N-body simulations[J]. RESEARCH IN ASTRONOMY AND ASTROPHYSICS,2021,21(1):8.
APA Wang, Qiao.(2021).A hybrid Fast Multipole Method for cosmological N-body simulations.RESEARCH IN ASTRONOMY AND ASTROPHYSICS,21(1),8.
MLA Wang, Qiao."A hybrid Fast Multipole Method for cosmological N-body simulations".RESEARCH IN ASTRONOMY AND ASTROPHYSICS 21.1(2021):8.
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