Giesecke, A.

Stefani, F.

English

UPCommons

Numerical simulations for the precession dynamo experiment in the framework of the DRESDYN project

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 Numerical simulations for the precession dynamo experiment in the framework  of the DRESDYN project  A. Giesecke*  and F. Stefani Helmholtz-Zentrum Dresden-Rossendorf   In a next generation dynamo experiment currently under development at Helmholtz- Zentrum Dresden-Rossendorf (HZDR) a fluid flow of liquid sodium, solely driven by precession, will be considered  as a possible source for magnetic field generation. I will present results from hydrodynamic simulations of a precession driven flow in cylindrical geometry.  In a second step, the velocity fields obtained from the hydrodynamic  simulations have been applied to a kinematic solver for the magnetic induction equation in order to determine whether a precession driven flow will be capable to drive a dynamo at experimental conditions. It turns out that excitation of dynamo action in a precessing cylinder at moderate precession rates is difficult,  and future dynamo simulations  are required in more extreme parameter regimes where a more complex fluid flow is observed in water experiments which is supposed to be beneficial for dynamo action.     

https://upcommons.upc.edu/bitstream/2117/101002/1/Eur%20GdR%20Dynamo%202016%20Numerical%20simulations%20for%20the%20precession.pdf

Numerical simulations for the precession dynamo experiment in the framework of the DRESDYN project

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