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Numerical and theoretical framework for the DRESDYN precession dynamo experiment

Pizzi, F.; Giesecke, A.; Simkanin, J.; Kumar, V.; Gundrum, T.; Stefani, F.


The upcoming DRESDYN (DREsden Sodium facility for DYNnamo and thermohydraulic
studies) precession experiment will test the possibility to achieve magnetohydrodynamic
dynamo action solely driven by precession. Here, after the description of the experi-
mental facility, we present the results from direct numerical simulations with the aim to
understand the flow behavior and its dynamo capability. The main conclusion is that
in the nonlinear regime the nutation angle is an essential governing parameter which
determines the flow structures and the possibility of dynamo action. We obtain clear
indications about the optimum configuration for the future experimental runs.

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