Thermoelectromagnetic stirring in Metallurgy


Thermoelectromagnetic stirring in Metallurgy

Cramer, A.; Zhang, X.; Gerbeth, G.

Thermoelectromagnetic convection in cubic containers was studied experimentally. Two opposing side walls were cooled and heated, respectively, to produce an uniform temperature gradient. Inhomogeneous magnetic field distributions were achieved either with a permanent magnet or with specifically shaped pole shoes of an electromagnetic system. Ultrasonic Doppler velocimetry demonstrated that even a moderate temperature gradient may drive distinct convection. Two different flow regimes were investigated with the permanent magnet. Located at an isothermal wall, it produced a single vortex spreading the whole container while the flow was relatively stable. Moving the magnet to the center altered the flow structure. Four vortices developed and the velocity fluctuations were intensified. The more generic case realised with the electromagnet provided a gradient of the magnetic field only in one direction. Since the field strength and the area of impact on the melt were larger, developed turbulent regimes were accomplished.

  • Invited lecture (Conferences)
    54th IWK - Internationales Wissenschaftliches Kolloquium, 07.-11.09.2009, Ilmenau, Deutschland
  • Contribution to proceedings
    54th IWK - Internationales Wissenschaftliches Kolloquium, 07.-11.09.2009, Ilmenau, Germany
    "Thermoelectromagnetic Stirring in Metallurgy", Ilmenau: ISLE, 978-3-938843-45-1

Permalink: https://www.hzdr.de/publications/Publ-12917
Publ.-Id: 12917