Journal
PHYSICS OF PLASMAS
Volume 18, Issue 7, Pages -Publisher
AIP Publishing
DOI: 10.1063/1.3603822
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Funding
- Hyogo Science and Technology Association [22I040]
- Yamada Science Foundation
- Okawa foundation
- KAKENHI [22740301, 23340128, 21244071]
- Grants-in-Aid for Scientific Research [23340128, 22740301, 21244071] Funding Source: KAKEN
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Aiming at understanding of magnetic field generation process in rapidly rotating stars and planets represented by the Earth, computer simulations of magnetohydrodynamic (MHD) dynamo were performed in a rotating spherical shell geometry. Thermal convection and dynamo process with Ekman number of the order of 10(-7) were studied. New structures of convection motion, dynamo-generated electrical current, and magnetic field are found. The flow is organized as a set of thin, sheet-like plumes. The current is made of small-scale coil structure with magnetic flux tubes within each of the coil. These flux tubes are connected each other to form a large scale helical magnetic field structure. (C) 2011 American Institute of Physics. [doi: 10.1063/1.3603822]
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