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Rayleigh-Benard convection is not only a classical problem in fluid dynamicsbut plays also an important role in many metallurgical and crystal growthapplications. The measurement of the flow field and of the dynamics of theemerging large-scale circulation in liquid metals is a challenging task due tothe opaqueness and the high temperature of the melts. Contactless inductiveflow tomography is a technique to visualize the mean three-dimensional flowstructure in liquid metals by measuring the flow induced magnetic fieldperturbations under the influence of one or several applied magnetic fields. Inthis paper, we present first measurements of the flow induced magnetic field ina Rayleigh-Benard setup, which are also used to investigate the dynamics of thelarge-scale circulation. Additionally, we investigate numerically the qualityof the reconstruction of the three-dimensional flow field for different sensorconfigurations.

Visualization of the global flow structure in a modified Rayleigh-Benard setup using contactless inductive flow tomography