Publikationsrepositorium - Helmholtz-Zentrum Dresden-Rossendorf

In this study, the dynamics of inertial waves inside a cylindrical vessel was studied experimentally. The liquid metal GaInSn was chosen as fluid in order to enable a contactless stimulation of the flow inside the cylinder by means of electromagnetic fields. A rotating magnetic field (RMF) generates a supercritical rotating motion of the liquid. The excitation of the inertial waves is realised by means of periodic field strength modulations and by means of short intense magnetic field pulses. Furthermore, the experiment demonstrates that inertial waves may be excited spontaneously by turbulent structures in the rotating flow. The ultrasound Doppler velocimetry was used to record the flow structure and to identify the inertial waves occurring in the setup.