Publikationsrepositorium - Helmholtz-Zentrum Dresden-Rossendorf

This paper presents a study concerning the transient dynamics of the flow field inside a liquid metal column created by an application of a rotating magnetic field (RMF) in form of a single pulse. The flow structure is governde by an impulsive spin-up form the rest state which is followed by a spin-down phase under the inertia of the fluid. A distinctive influence of pulse length the transient fluid flow has been found. Our results reveal that the recirculating flow in the radial-meridional plane shows periodic reversals. This phenomena is especially pronounced if the pulse length of the electromagnetic forcing corresponds to the so-called initial adjustment phase.