2011 Fiscal Year Final Research Report
Two-layer MHD flows in a rotating sphere
| Project/Area Number |
21654064
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| Research Category |
Grant-in-Aid for Challenging Exploratory Research
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| Allocation Type | Single-year Grants |
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| Research Field |
Meteorology/Physical oceanography/Hydrology
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| Research Institution | Kyoto University |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
YAMADA Michio 京都大学, 数理解析研究所, 教授 (90166736)
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| Project Period (FY) |
2009 – 2011
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| Keywords | 地球内核 / 地球流体核 / ダイナモ作用 / 磁気対流 / 回転対流 |
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| Research Abstract |
MHD flows in a rotating sphere divided into the highly viscous inner sphere with high density, and the low viscous outer spherical shell with low density are examined theoretically and numerically. The flows in the inner sphere can be driven by the Joule heating associated with penetrating magnetic field generated by dynamo action in the outer shell. On the other hand, the flows in the inner sphere may affect the MHD flows in the outer shell through the distribution of buoyancy flux at the boundary between the inner sphere and outer shell. Such MHD interaction through the Joule heating may operate between the inner and the outer core of the Earth.
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