A three-dimensional multilayered spherical dynamic interface dynamo using the Malkus-Proctor formulation
文献类型：期刊论文
| 作者 | Chan, K. H.1; Liao, X.2 ; Zhang, K.3,4
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| 刊名 | ASTROPHYSICAL JOURNAL
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| 出版日期 | 2008-08-01 |
| 卷号 | 682期号:2页码:1392-1403 |
| 关键词 | Sun : magnetic fields |
| 英文摘要 | We investigate a fully three-dimensional and multilayered spherical dynamic interface dynamo using a finite-element method based on the three-dimensional tetrahedralization of the whole spherical system. The dynamic interface dynamo model consists of four magnetically coupled zones: an electrically conducting and uniformly rotating core, a thin differentially rotating tachocline, a turbulent convection envelope, and a nearly insulating exterior. In the thin tachocline at the base of the convection zone, a differential rotation, similar to that of the observed solar differential rotation, is imposed. In the convection zone, the Malkus-Proctor formulation with a prescribed alpha-effect is employed while the fully three-dimensional dynamic feedback of Lorentz forces is taken into account. Our numerical simulations of the dynamic interface dynamo are focused on the Taylor number Ta = 10(5) with a unity magnetic Prandtl number. It is shown that the dynamic interface dynamo, depending on the size of the magnetic Reynolds number Re-m based on the differential rotation, can be either nonaxisymmetric or axisymmetric. When Re-m is small or moderate, the dynamic dynamo is characterized by quasi-periodic and nonaxisymmetric azimuthally traveling waves. When Re-m is sufficiently large, the dynamo is characterized by a strong toroidal magnetic field, axisymmetric or nearly axisymmetric, that selects dipolar symmetry and propagates equatorward. Implications of our dynamic interface dynamo for the solar dynamo are also discussed. |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 类目[WOS] | Astronomy & Astrophysics |
| 研究领域[WOS] | Astronomy & Astrophysics |
| 关键词[WOS] | SOLAR CONVECTION ZONE ; FLUX-TRANSPORT DYNAMO ; FINITE-ELEMENT-METHOD ; DIFFERENTIAL ROTATION ; MAGNETIC-FIELDS ; TORSIONAL OSCILLATIONS ; MERIDIONAL CIRCULATION ; KINEMATIC MODELS ; GIANT PLANETS ; GENERATION |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000258026100063 |
| 源URL | [http://119.78.226.72/handle/331011/19464]  |
| 专题 | 上海天文台_天文地球动力学研究中心 |
| 作者单位 | 1.Univ Hong Kong, Dept Math, Pokfulam, Hong Kong, Peoples R China 2.Shanghai Astron Observ, Shanghai 200030, Peoples R China 3.Univ Exeter, Dept Math Sci, Exeter EX4 4QE, Devon, England 4.Univ Exeter, Ctr Geophys & Astrophys Fluid Dynam, Exeter EX4 4QE, Devon, England |
| 推荐引用方式 GB/T 7714 | Chan, K. H.,Liao, X.,Zhang, K.. A three-dimensional multilayered spherical dynamic interface dynamo using the Malkus-Proctor formulation[J]. ASTROPHYSICAL JOURNAL,2008,682(2):1392-1403. |
| APA | Chan, K. H.,Liao, X.,&Zhang, K..(2008).A three-dimensional multilayered spherical dynamic interface dynamo using the Malkus-Proctor formulation.ASTROPHYSICAL JOURNAL,682(2),1392-1403. |
| MLA | Chan, K. H.,et al."A three-dimensional multilayered spherical dynamic interface dynamo using the Malkus-Proctor formulation".ASTROPHYSICAL JOURNAL 682.2(2008):1392-1403. |
入库方式： OAI收割
来源：上海天文台
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