Thermally Driven MHD Dynamo in a Rotating Spherical Shell
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概要
- 論文の詳細を見る
In order to find a possible mechanism of the geodynamo the motion of an electrically conducting Boussinesq fluid which is driven by the thermal convection in a rotating spherical shell is investigated numerically. It is observed that the dynamo action can be effective when the Roberts number is below a critical value and that the polarity of the magnetic dipole moment changes chaotically in time. The intensification mechanism of the magnetic field - the concentrate-and-stretch of the magnetic lines - is clarified at the first time by a detailed comparison of the spatial structures of the velocity and the magnetic fields.
- 理論物理学刊行会の論文
- 1998-06-28
著者
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Kida Shigeo
Theory And Simulation Center National Institute For Fusion Science
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Kida S
National Inst. Fusion Sci. Toki Jpn
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KITAUCHI Hideaki
Theory and Computer Simulation Center, National Institute for Fusion Science
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Kitauchi H
Theory And Computer Simulation Center National Institute For Fusion Science
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Kitauchi Hideaki
Theory And Computer Simulation Center National Institute For Fusion Science
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Kida Shigeo
Theory And Computer Simulation Center National Institute For Fusion Science
関連論文
- Overall Self-Similar Decay of Two-Dimensional Turbulence : Classical Phenomenology and Applications
- Thermally Driven MHD Dynamo in a Rotating Spherical Shell
- Automatic Tracking of Low-Pressure Vortex
- Equatorial magnetic dipole field intensification by convection vortices in a rotating spherical shell
- Scalar vorticity transitions in viscous two-dimensional stagnation flow
- Swirl Condition in Low-Pressure Vortices
- Double Spirals around a Tubular Vortex in Turbulence
- Chaotic Reversals of Dipole Moment of Thermally Driven Magnetic Field in a Rotating Spherical Shell
- Periodic Reversals of Magnetic Field Generated by Thermal Convection in a Rotating Spherical Shell
- Identification of Tubular Vortices in Turbulence
- Topological,Structure of Magnetic Flux Lines Generated by Thermal Convection in a Rotating Spherical Shell
- Late states of incompressible 2D decaying vorticity fields