Numerical simulations for the DRESDYN precession dynamo
A. Giesecke, T. Albrecht, G. Gerbeth, T. Gundrum, F. Stefani
TL;DR
This paper presents numerical simulations of a precession-driven liquid sodium dynamo experiment, analyzing magnetic field growth rates in a cylindrical setup to assess dynamo conditions.
Contribution
It introduces a simulation approach using hydrodynamic models to evaluate magnetic field growth in a precession dynamo experiment.
Findings
Magnetic field growth rates remain below the dynamo threshold at Rm=2000.
Simulations provide insights into the flow dynamics influencing dynamo action.
The study informs future experimental designs for dynamo realization.
Abstract
The next generation dynamo experiment currently under development at Helmholtz-Zentrum Dresden-Rossendorf (HZDR) will consist of a precessing cylindrical container filled with liquid sodium. We perform numerical simulations of kinematic dynamo action applying a velocity field that is obtained from hydrodynamic models of a precession driven flow. So far, the resulting magnetic field growth-rates remain below the dynamo threshold for magnetic Reynolds numbers up to Rm=2000.
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Taxonomy
TopicsGeomagnetism and Paleomagnetism Studies · Geophysics and Gravity Measurements · Solar and Space Plasma Dynamics