Experimental study of the flow driven by combined AC magnetic fields using a novel ultrasound array systemReport as inadecuate




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1 Helmholtz - Zentrum Dresden - Rossendorf 2 TUD - Technische Universität Dresden

Abstract : Ultrasound velocity measurements were performed in a liquid metal flow GaInSn inside a cubic vessel. The flow was driven by the combined action of a rotating RMF and a travelling magnetic field TMF leading to an inherent three-dimensional electromagnetic force distribution in the fluid. As a result flow structures develop which are essentially determined by the frequency difference and the strength relation of both fields. The driving force is stationary for identical frequencies whereas it undergoes a slow temporal modulation in case of slightly varying frequencies. Beside the magnetic field parameter the alignment of the TMF’s to the fluid volume’s axis plays a crucial role. A novel ultrasound array system was used in the present study to measure two velocity components in two perpendicular planes 2d-2c simultaneously. This contribution reports on the influence of axial alignment on the flow, and on the flow dynamics resulting from slightly different field frequencies of the RMF and the TMF.

Keywords : Ultrasound Sensor Array Flow Field Measurements Magnetohydrodynamics Electromagnetic Stirring





Author: J Pal - A Cramer - S Franke - S Eckert - R Nauber - N Thieme - L Büttner - J Czarske -

Source: https://hal.archives-ouvertes.fr/



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