Numerical simulations for the DRESDYN precession dynamo

A. Giesecke¹ - T. Albrecht² - G. Gerbeth¹ - T. Gundrum¹ - F. Stefani¹

¹ Helmholtz-Zentrum Dresden-Rossendorf, P.O. Box 510119, D-01314 Dresden, Germany
² Department of Mechanical and Aerospace Engineering, Monash University, VIC 3800, Australia

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. Figs 9, Refs 24.