2018/07/05 by O. Goepfert, O Goepfert, A. Tilgner · 6 citations
Biochemistry, Genetics and Molecular Biology · Earth and Planetary Sciences · Physics and Astronomy · #Classical mechanics #Dynamo #Dynamo theory #Ekman number #Flow (mathematics) #Geomagnetism and Paleomagnetism Studies #Geophysics and Gravity Measurements #Inertial frame of reference #Magnetic Reynolds number #Magnetic field #Magnetohydrodynamics #Mechanics #Physics #Reynolds number #Rotational symmetry #Solar and Space Plasma Dynamics #Turbulence #physics.flu-dyn
paper · pdf · doi:10.1080/03091929.2018.1492719
published in Geophysical & Astrophysical Fluid Dynamics 113(1-2), 222-234 (Taylor & Francis)
arxiv created 2018/07/05 · openalex publication_date 2018/08/13 · arxiv updated 2019/05/22 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
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.