Nonlinearity in a dynamo

Using a rotating flat layer heated from below as an example, we consider effects which lead to stabilizing an exponentially growing magnetic field in magnetostrophic convection in transition from the kinematic dynamo to the full non-linear dynamo. We present estimates of the energy redistribution ov...

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Bibliographic Details
Published inGeophysical and astrophysical fluid dynamics Vol. 104; no. 5-6; pp. 491 - 504
Main Authors Hejda, P., Reshetnyak, M.
Format Journal Article
LanguageEnglish
Published Abingdon Taylor & Francis Group 01.10.2010
Taylor & Francis Ltd
Subjects
Boussinesq convection
Flow velocity
Fluid dynamics
Geophysics
Geostrophy
Helicity
Kinematics
Magnetic fields
Nonlinearity
Quenching
Rotating generators
Simulation
Triads
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Summary:Using a rotating flat layer heated from below as an example, we consider effects which lead to stabilizing an exponentially growing magnetic field in magnetostrophic convection in transition from the kinematic dynamo to the full non-linear dynamo. We present estimates of the energy redistribution over the spectrum and helicity quenching by the magnetic field. We also study the alignment of the velocity and magnetic fields. These regimes are similar to those in planetary dynamo simulations.
Bibliography:ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
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ISSN:0309-1929
1029-0419
DOI:10.1080/03091929.2010.496365