Measurement of the characteristics of the magnetohydrodynamic flow of mercury in a closed cylindrical vessel

V. I. Doronin - V. V. Dremov - A. B. Kapusta

Abstract
A closed cylindrical vessel made of stainless steel, having a nonelectrically conducting current meter, was used to investigate the velocity and the acceleration of the azimuthal now of mercury in a rotating magnetic field with Hartmann numbers 0.4 ≤ Ha_d ≤ 18. It is shown that the measured velocities are less than the theoretical velocities by approximately four times. This is explained by the fact that the theoretical formula describes the velocity of laminar one-dimensional now, while in the experiment, three-dimensional laminar-vortex now is established. The trans ition from laminar to laminar-vortex now takes place at Ha_d << 0.4. It is noted that with acceleration and deceleration of a liquid there is also restructuring of the now conditions.