The dependence of the dynamo alpha on vorticity | Zendy

Axel Brandenburg | Zendy; Karl Johan Donner | Zendy

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The dependence of the dynamo alpha on vorticity

Author(s) -

Axel Brandenburg,

Karl Johan Donner

Publication year - 1997

Publication title -

monthly notices of the royal astronomical society

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.058

H-Index - 383

eISSN - 1365-8711

pISSN - 0035-8711

DOI - 10.1093/mnras/288.2.l29

Subject(s) - dynamo , physics , vorticity , equipartition theorem , turbulence , dynamo theory , shearing (physics) , sign (mathematics) , magnetic field , classical mechanics , quantum electrodynamics , astrophysics , vortex , mechanics , quantum mechanics , mathematical analysis , mathematics , thermodynamics

We use data from numerical simulations of dynamo-generated turbulence in the shearing box approximation to determine the dynamo α-effect and its dependence on the rotation law Ω2(r). The data suggest that the dynamo α is not simply proportional to the local angular velocity Ω(r), as is usually assumed, but rather is proportional to the local vorticity ω(r) = r−1d/dr(ωr2). We also find tentative ev...

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