Bibcode
Archontis, Vasilis D.; Dorch, Bertil F.
Referencia bibliográfica
Magnetic Fields and Helicity in the Sun and Heliosphere, 25th meeting of the IAU, Joint Discussion 3, 16 July, 2003, Sydney, Australia, meeting abstract
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2003
Número de citas
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Descripción
We performed numerical 3-d MHD simulations to study whether or not the
presence of helicity is a necessary ingredient for fast dynamo action. A
steady 3-d flow with no mean helicity is used and is turned out that
apart from the high growth rate in the linear regime the dynamo
saturates at a level significantly higher that the intermittent
turbulent dynamos. It becomes clear from this example that the precense
of a mean helicity is not at all a requirement for dynamo action but it
is rather the stretching ability of the flow that amplifies the
magnetic energy in an exponential manner.