Journal
MAGNETOHYDRODYNAMICS
Volume 58, Issue 1-2, Pages 187-193Publisher
UNIV LATVIA INST PHYSICS
DOI: 10.22364/mhd.58.1-2.20
Keywords
Magnetohydrodynamics; Rayleigh-Benard convection; liquid metal flow; electromagnetic forcing; CFD
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Funding
- European Research Council (ERC) under the European Unions Horizon 2020 Research and Innovation Programme [787544]
- Helmholtz-Russian Science Foundation Joint Research Group Magnetohydrodynamic Instabilities [HRSF-0044, 18-41-06201]
- Russian Science Foundation [18-41-06201] Funding Source: Russian Science Foundation
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This paper mainly investigates the influence of tidal perturbations on the periodicity problem in solar dynamo and presents numerical simulation results.
The synchronization of the helicity of an instability with azimuthal wavenumber m =1 by a weak tidal m = 2 perturbation might play a key role in explaining the phase-stable Schwabe cycle of the solar dynamo [1]. To elucidate this type of interaction, we study a thermally driven Rayleigh-Be??nard convection under a tide-like influence. We focus first on the generation of the m = 2 mode flow by electromagnetic forcing and then on its low-frequency modulation. In the last section, we present preliminary results on the interaction of this perturbation with the sloshing/torsional motion of the Large Scale Circulation (LSC) of a Rayleigh-Be??nard convection flow. While the main focus of the paper is on the numerical side, some comparisons with experimental results are also made.
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