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- W2152821376 abstract "Intermediate dynamos are axisymmetric, spherical models that evade Cowling's theorem by invoking an α-effect to create the meridional magnetic field from the zonal. Usually the energy source maintaining the motions is a specified thermal wind, but here the dynamo is driven by the buoyancy created by a uniform distribution of heat sources. It has been argued by Braginsky and Meytlis (this journal, vol. 55, 1990) that, in a rapidly rotating, strongly magnetic system such as the Earth's core, heat is transported principally by a small-scale turbulence that is highly anisotropic. They conclude that the diffusion of heat parallel to the rotation axis is then significantly greater than it is in directions away from that axis. A preliminary study of the consequences of this idea is reported here. Solutions are derived numerically using both isotropic and non-isotropic thermal diffusivity tensors, and the results are compared. It is shown that even a small degree of anisotropy can materially alter the character of the dynamo." @default.
- W2152821376 created "2016-06-24" @default.
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- W2152821376 date "2004-10-01" @default.
- W2152821376 modified "2023-09-24" @default.
- W2152821376 title "The effect of anisotropic heat transport in the earth's core on the geodynamo" @default.
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- W2152821376 doi "https://doi.org/10.1080/03091920412331272867" @default.
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