Stability of the electrically induced flow between two hemispherical electrodes


Stability of the electrically induced flow between two hemispherical electrodes

Shatrov, V.; Gerbeth, G.

The stability of the steady laminar flow driven by the meridional electromagnetic force due to an electric current from a hemispherical electrode to a hemispherical cavity surface is studied using a multi-domain pseudospectral method. The analysis is performed for a broad ratio of electrode and cavity radii. The most unstable azimuthal wave number is found as m=4, which differs from literature results for the flow in a cone with a point-electrode where the most unstable wave number was found as m=0. In the presence of an external uniform magnetic field the fluid rotates in azimuthal direction. Already for a rather low strength of the external magnetic field, the meridional flow in the main toroidal eddy changes its direction from counter-clockwise to clockwise

Keywords: meridional electromagnetic

  • Magnetohydrodynamics 48(2012)3, 469-483

Permalink: https://www.hzdr.de/publications/Publ-18095
Publ.-Id: 18095