Publications Repository - Helmholtz-Zentrum Dresden-Rossendorf

2 Publications

Fluid Velocity Measurements in Electro-Vortical Flows

Cramer, A.; Gerbeth, G.; Terhoeven, P.; Krätzschmar, A.

This class of flows is characterized by the feeding of strong electrical currents into a volume of liquid metal. A prominent example of industrial interest is the electrode-welding where the current is supplied via a locally restricted area, leading to high current densities. The interaction of these currents with their own magnetic field drives flows which exhibit phenomena like formation of jets and pinch-effect. Further increasing the current may lead to disruption of the melt column accompanied with a discharge. This can be used for a liquid metal current limiter with self-healing properties.
Local measurements of the flow structures are of obvious interest for a better understanding of these phenomena. The paper will give results from a systematic study of the flow structure performed by means of our mechano-optical velocity probe. The measured flow structure of the evolving jet was found to be in a reasonable agreement with our numerical simulations.

Keywords: Current limiter; electro-vortical flows; pinch effect; measuring techniques for liquid metals; local velocity measurement; local pressure measurement

  • Lecture (Conference)
    132nd Annual Meeting & Exhibition (TMS), San Diego, California, March 2-6, 2003
  • Materials and Manufacturing Processes 19(2004), 665-678

Permalink: https://www.hzdr.de/publications/Publ-5335
Publ.-Id: 5335