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A hybrid cosmological hydrodynamic/N-body code based on a weighted essentially nonoscillatory scheme
Feng, LL; Shu, CW; Zhang, MP
2004-09-01
Source PublicationASTROPHYSICAL JOURNAL
ISSN0004-637X
Volume612Issue:1Pages:1-13
AbstractWe present a newly developed cosmological hydrodynamics code based on weighted essentially non-oscillatory (WENO) schemes for hyperbolic conservation laws. WENO is a higher order accurate finite difference scheme designed for problems with piecewise smooth solutions containing discontinuities and has been successfully applied for problems involving both shocks and complicated smooth solution structures. We couple hydrodynamics based on the WENO scheme with the standard Poisson solver-particle-mesh (PM) algorithm for evolving the self-gravitating system. The third-order low-storage total variation diminishing (TVD) Runge-Kutta scheme has been used for the time integration of the system. To test the accuracy and convergence rate of the code, we subject it to a number of typical tests, including the Sod shock tube in multiple dimensions, the Sedov blast wave, and formation of the Zel'dovich pancake. These tests validate the WENO hydrodynamics with a fast convergence rate and high accuracy. We also evolve a low-density flat cosmological model (LambdaCDM) to explore the validity of the code in practical simulations.
KeywordCosmology : Theory Large-scale Structure Of Universe
Subject AreaAstronomy & Astrophysics
WOS HeadingsScience & Technology ; Physical Sciences
WOS KeywordSMOOTHED PARTICLE HYDRODYNAMICS ; HYPERBOLIC CONSERVATION-LAWS ; PIECEWISE PARABOLIC METHOD ; ORDER WENO SCHEMES ; FINITE-DIFFERENCE ; ENO SCHEMES ; EFFICIENT IMPLEMENTATION ; NUMERICAL SIMULATIONS ; COMPOSITE SCHEMES ; N-BODY
Indexed BySCI
Language英语
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000223634400001
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Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/7717
Collection南极天文中心
Affiliation1.Chinese Acad Sci, Purple Mt Observ, Nanjing 210008, Jiangsu, Peoples R China
2.Univ Sci & Technol China, Ctr Astrophys, Hefei 230026, Anhui, Peoples R China
3.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China
4.Brown Univ, Div Appl Math, Providence, RI 02912 USA
5.Univ Sci & Technol China, Dept Math, Hefei 230026, Anhui, Peoples R China
Recommended Citation
GB/T 7714
Feng, LL,Shu, CW,Zhang, MP. A hybrid cosmological hydrodynamic/N-body code based on a weighted essentially nonoscillatory scheme[J]. ASTROPHYSICAL JOURNAL,2004,612(1):1-13.
APA Feng, LL,Shu, CW,&Zhang, MP.(2004).A hybrid cosmological hydrodynamic/N-body code based on a weighted essentially nonoscillatory scheme.ASTROPHYSICAL JOURNAL,612(1),1-13.
MLA Feng, LL,et al."A hybrid cosmological hydrodynamic/N-body code based on a weighted essentially nonoscillatory scheme".ASTROPHYSICAL JOURNAL 612.1(2004):1-13.
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