Numerical and theoretical framework for the DRESDYN precession dynamo experiment

TL;DR

This paper presents a numerical and theoretical framework for the DRESDYN precession dynamo experiment, focusing on flow behavior, dynamo capability, and optimal configurations for experimental success.

Contribution

It introduces a comprehensive numerical and theoretical approach to understand flow dynamics and dynamo potential in the DRESDYN precession experiment, highlighting the importance of the nutation angle.

Findings

Nutation angle critically influences flow structures and dynamo action.

Optimal configurations identified for future experimental runs.

Flow behavior characterized through direct numerical simulations.

Abstract

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 experimental 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.