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Ultrasound Doppler flow measurements in a liquid column under the influence of a strong axial current

M. Starace , N. Weber , M. Seilmayer , C. Kasprzyk , T. Weier , F. Stefani , S. Eckert

Institute of Fluid Dynamics, Helmholtz-Zentrum Dresden--Rossendorf, Bautzner Landstraße 400, 01328 Dresden, Germany

Magnetohydrodynamic instabilities can constitute a serious hazard to the functionality of liquid metal batteries. Here we consider the Tayler instability, which appears when the electric current, passing through a conducting fluid, reaches a critical value. The experiment discussed in this article involves a column of a eutectic GaInSn alloy, along whose axis an electric current passes. Ultrasound transducers encased in a copper electrode bounding the top of the column were used to obtain the vertical component of fluid flow, once a noise suppression system had been devised. The data thus retrieved will be discussed here. Figs 5, Refs 13.

Magnetohydrodynamics 51, No. 2, 249-256, 2015 [PDF, 8.09 Mb]

Copyright: Institute of Physics, University of Latvia
Electronic edition ISSN 1574-0579
Printed edition ISSN 0024-998X