Synchronizing the helicity of Rayleigh-Bénard convection by a tide-like electromagnetic forcing
arXiv:2207.09981 · doi:10.1063/5.0114035
Abstract
We present results on the synchronization of the helicity in a liquid-metal Rayleigh-Bénard (RB) experiment under the influence of a tide-like electromagnetic forcing with azimuthal wavenumber m=2. We show that for a critical forcing strength the typical Large Scale Circulation (LSC) in the cylindrical vessel of aspect ratio unity is entrained by the period of the tide-like forcing, leading to synchronized helicity oscillations with opposite signs in two half-spaces. The obtained experimental results are consistent with and supported by numerical simulations. A similar entrainment mechanism for the helicity in the solar tachocline may be responsible for the astonishing synchronization of the solar dynamo by the 11.07-year triple synodic alignment cycle of the tidally dominant planets Venus, Earth and Jupiter.
References in corpus (22)
- Rotations and cessations of the large-scale circulation in turbulent Rayleigh-Benard convection
- Dynamo theories
- Plume motion and large-scale circulation in a cylindrical Rayleigh-Bénard cell
- Origin of the Temperature Oscillation in Turbulent Thermal Convection
- The Turbulent Dynamo
- Experimental evidence for Tayler instability in a liquid metal column
- Does the Sun work as a nuclear fusion amplifier of planetary tidal forcing? A proposal for a physical mechanism based on the mass-luminosity relation
- The cause of oscillations of the large-scale circulation of turbulent Rayleigh-B{é}nard convection
- Magnetohydrodynamic experiments on cosmic magnetic fields
- Oscillations of the large-scale circulation in turbulent Rayleigh-Bénard convection: the off-center mode and its relationship with the torsional mode
- Combined measurement of velocity and temperature in liquid metal convection
- A model of a tidally synchronized solar dynamo
- Flow regimes of Rayleigh-Bénard convection in a vertical magnetic field
- Synchronized helicity oscillations: a link between planetary tides and the solar cycle?
- Equatorial magnetohydrodynamic shallow water waves in the solar tachocline
- Collapse of Coherent Large Scale Flow in Strongly Turbulent Liquid Metal Convection
- Shaken and stirred: When Bond meets Suess-de Vries and Gnevyshev-Ohl
- Phase coherence and phase jumps in the Schwabe cycle
- On the synchronizability of Tayler-Spruit and Babcock-Leighton type dynamos
- Schwabe, Gleissberg, Suess-de Vries: Towards a consistent model of planetary synchronization of solar cycles
- Tidally Forced Planetary Waves in the Tachocline of Solar-like Stars
- The cyclic behaviour in the N-S asymmetry of sunspots and solar plages for the period 1910 to 1937 using data from Ebro catalogues