Publications Repository - Helmholtz-Zentrum Dresden-Rossendorf

1 Publication
On the formation of Taylor-Görtler vortices in RMF-driven spin-up flows
Vogt, T.; Grants, I.; Räbiger, D.; Eckert, S.; Gerbeth, G.;
This paper is concerned with a liquid metal flow driven by a rotating magnetic field inside a stationary cylinder. We consider especially the secondary meridional flow during the time the fluid spins up from rest. The developing flow is investigated experimentally and by direct numerical simulations. The vertical profiles of the axial velocity are measured by means of the ultrasound Doppler velocimetry. Evolving instabilities in form of Taylor-Görtler vortices have been observed just above the instability threshold. The transition to a three-dimensional flow in the side layers results from the advection or a precession and splitting of the Taylor-Görtler vortex rings. The numerical simulations agree very well with the flow measurements.
Keywords: rotating magnetic field, Taylor-Görtler vortex, flow measurements, ultrasound Doppler method, direct numerical simulation

Publ.-Id: 15622 - Permalink