Ch. Karcher, D. Hernández
Dynamics of Falling Liquid Metal Droplets and Jets Influenced by a Strong Axial Magnetic Field
Non-contact electromagnetic shaping of liquid metal free surfaces is crucial in several metallurgic processes including bending or stabilization of jets in casting or fusion applications. In this context we experimentally study the influence of strong axial magnetic fields up to 5 T on the dynamics of falling droplets and jets. As a test melt we use GaInSn which is liquid at room temperature. In the experiments we vary the magnetic flux density, the tilt angle, the liquid metal flow rate, and the diameter and the material (conducting/non-conducting) of the nozzle. As major results we find that under the influence of the field, liquid metal droplets are stretched in the field direction, droplet rotation ceases, and the droplet axis aligns with the axis of the field. Moreover, we observe that jet break-up into droplets is suppressed and, for the case conducting nozzle and tilt, jets are bent towards the field axis.
Proceedings of the VIII International Scientific Colloquim "Modelling for Materials Processing", Riga, Latvia, (2017), pp. 283-288.