Electromagnetic stirring with superimposed travelling and rotating magnetic fields

Flow visualization and velocity measurements in a liquid metal flow were performed in order to study the combined action of a rotating and a travelling magnetic field. The combination of both fields, which is not necessarily a linear superposition, may give rise to an inherent three-dimensional constituent of the electromagnetic force distribution. As the Lorentz force may also become time-dependent, a quite intense mixing of metallic melts is achievable.