Numerical simulation of tidal synchronization of the large-scale circulation in Rayleigh--Bénard convection with aspect ratio 1

• Published in: Magnetohydrodynamics (New York, N.Y. 1965) Vol. 58; no. 3; pp. 285 - 292
• Main Authors: Röhrborn, S., Jüstel, P., Galindo, V., Stefani, F., Stepanov, R.
• Format: Journal Article
• Language: English
• Published: 2023
• DOI: 10.22364/mhd.58.3.5
• ISSN: 0024-998X

A possible explanation for the apparent phase stability of the 11.07-year Schwabe cycle of the solar dynamo was the subject of a series of recent papers [1-3]. The synchronization of the helicity of an instability with the azimuthal wavenumber m = 1 by a tidal m = 2 perturbation played a key role here. To analyze this type of interaction in a paradigmatic setup, we study a thermally driven Rayleigh-Bénard convection of a liquid metal under the influence of a tide-like electromagnetic forcing. As shown previously, the time-modulation of this forcing emerges as a peak frequency in the m = 2 mode of the radial flow velocity component. In this paper, we present new numerical results on the interplay between the large-scale circulation of a Rayleigh-Bénard convection flow and the time modulated electromagnetic forcing. Key words: Magnetohydrodynamics, Rayleigh-Bénard convection, liquid metal flow, electromagnetic forcing, CFD. Figs 7, Refs 10.