Numerical simulation of core convection by a multi-layer semi-implicit spherical spectral method
文献类型：期刊论文
| 作者 | Cai, Tao1; Chan, Kwing L.1; Deng, Licai2
|
| 刊名 | JOURNAL OF COMPUTATIONAL PHYSICS
 |
| 出版日期 | 2011-10-01 |
| 卷号 | 230期号:24页码:8698-8712 |
| 关键词 | Spherical spectral method Multi-layer scheme Turbulence Core convection |
| 英文摘要 | 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. |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000297081700004 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/7972]  |
| 专题 | 国家天文台_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 |
| 推荐引用方式 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. |
入库方式： OAI收割
来源：国家天文台
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