Earth and Plenatary Dynamos
The Earth has its intrinsic magnetic field, but
its origin is not easily explained.....
It is considered that the Earth's magnetic field is
generated and maintained by a dynamo action
in the Earth's outer core; that is,
fluid motions in the highly electrically conducting core
induce an electromotive force from
an inducing magnetic field.
The electromotive force creates electrical currents,
which generate a magnetic field.
If thus induced magnetic field is the inducing magnetic field
it self, the magnetic field will be maintained!!
In other words, kinetic energy is converted into
magnetic energy by a DYNAMO action.
My study is to clarify this mechanism on GEODYNAMO.
This problem is considered to be one of magnetohydrodynamics (MHD).
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Masaki Matsushima
August 19, 2005