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Numerical simulation of core convection by a multi-layer semi-implicit spherical spectral method
Cai, Tao1; Chan, Kwing L.1; Deng, Licai2
2011-10-01
发表期刊JOURNAL OF COMPUTATIONAL PHYSICS
卷号230期号:24页码:8698-8712
摘要A semi-implicit multi-layer spherical spectral method for simulating stellar core convection is described. The fully compressible three-dimensional hydrodynamic equations with rotation and energy generation are solved. Prognostic variables are expressed as finite sums of spherical harmonics in the horizontal directions and handled by the finite difference method in the radial direction. The stratified approximation is used to simplify the nonlinearity to quadratic. A multi-layer scheme is employed to overcome the time step problem arising from shrinking grid sizes in the physical space near the center of the star. Despite of the different spectral truncations in different layers, round-off conservation of the total mass and total angular momentum of the whole domain can be maintained, and were confirmed numerically. The code is parallelized; with 12 processors the speedup factor is about 9. The solutions of model core convection with and without rotation are discussed. (C) 2011 Elsevier Inc. All rights reserved.
关键词Spherical Spectral Method Multi-layer Scheme Turbulence Core Convection
DOI10.1016/j.jcp.2011.08.014
收录类别SCI
语种英语
WOS记录号WOS:000297081700004
引用统计
被引频次:7[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.bao.ac.cn/handle/114a11/7972
专题光学天文研究部
作者单位1.Hong Kong Univ Sci & Technol, Dept Math, Hong Kong, Hong Kong, Peoples R China
2.Chinese Acad Sci, Natl Astron Observ, Beijing, Peoples R China
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GB/T 7714
Cai, Tao,Chan, Kwing L.,Deng, Licai. Numerical simulation of core convection by a multi-layer semi-implicit spherical spectral method[J]. JOURNAL OF COMPUTATIONAL PHYSICS,2011,230(24):8698-8712.
APA Cai, Tao,Chan, Kwing L.,&Deng, Licai.(2011).Numerical simulation of core convection by a multi-layer semi-implicit spherical spectral method.JOURNAL OF COMPUTATIONAL PHYSICS,230(24),8698-8712.
MLA Cai, Tao,et al."Numerical simulation of core convection by a multi-layer semi-implicit spherical spectral method".JOURNAL OF COMPUTATIONAL PHYSICS 230.24(2011):8698-8712.
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