Mechanisms for magnetic Field generation in precessing cubes
| Autor: | O. Goepfert, Andreas Tilgner |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
Physics
Inertial frame of reference Turbulence Fluid Dynamics (physics.flu-dyn) Computational Mechanics FOS: Physical sciences Magnetic Reynolds number Astronomy and Astrophysics Mechanics Physics - Fluid Dynamics 01 natural sciences 010305 fluids & plasmas Magnetic field Physics::Geophysics Physics::Fluid Dynamics Geophysics Geochemistry and Petrology Mechanics of Materials 0103 physical sciences Dynamo theory Physics::Space Physics Precession Vector field 010306 general physics Dynamo |
| Popis: | It is shown that flows in precessing cubes develop at certain parameters large axisymmetric components in the velocity field which are large enough to either generate magnetic fields by themselves, or to contribute to the dynamo effect if inertial modes are already excited and acting as a dynamo. This effect disappears at small Ekman numbers. The critical magnetic Reynolds number also increases at low Ekman numbers because of turbulence and small-scale structures. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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