Publications Repository - Helmholtz-Zentrum Dresden-Rossendorf

1 Publication

The precession dynamo experiment at HZDR

Giesecke, A.; Pizzi, F.; Kumar, V.; Anders, S.; Ratajczak, M.; Gundrum, T.; Stefani, F.

Cosmic magnetic fields exist on all scales, from planets and stars to
galaxies and beyond. The generation of these fields via the
hydromagnetic dynamo effect involves the formation of electrical
currents by means of complex flows of conducting fluids or plasmas. At
HZDR a related experiment is under construction within the project
DRESDYN. In that experiment a precessing flow of liquid sodium will
provide the required energy for magnetic field generation.

Here we address preliminary numerical and experimental studies aimed
at the identification of parameter ranges where a dynamo can be
expected. Our kinematic dynamo models show that dynamo action is
possible just before the transition from a laminar flow state to
vigorous turbulence where the flow structure is determined by a
combination of axisymmetric and nonaxisymmetric large scale modes. By
applying the derived scaling laws, the results can be directly applied
to the parameters of the planned large device.

Keywords: Dynamo

  • Poster (Online presentation)
    MML-Workshop 2021, 22.-24.11.2021, virtuell, virtuell

Publ.-Id: 33446