Publications Repository - Helmholtz-Zentrum Dresden-Rossendorf

In the Czochralski crystal growth the poloidal flow structure in the melt just below the meniscus plays a key role for the quality of the crystal. In order to investigate the applicability of the contactless inductive flow tomography to such a configuration, we equipped a modified Rayleigh-Benard setup with an axial excitation magnetic field and 20 magnetic field sensors. In this paper we present measurements of the flow induced magnetic field perturbations for several temperature gradients between the cooled top and the heated bottom. Typical features of the thermally driven turbulent flow could be detected in the magnetic field measured around the fluid vessel. Additionally, we will show first reconstructions of the flow.