5.4.3 - Adaptive Ultrasound Doppler Velocimeter for the investigation of turbulent flows in liquid metals

Event
18. GMA/ITG-Fachtagung Sensoren und Messsysteme 2016
2016-05-10 - 2016-05-11
Nürnberg, Germany
Chapter
5.4 Tomographische Messverfahren
Author(s)
K. Mäder, R. Nauber, H. Beyer, A. Klaß, C. Kupsch, N. Thieme, L. Büttner, J. Czarske - Technische Universität Dresden, Dresden (Germany)
Pages
397 - 403
DOI
10.5162/sensoren2016/5.4.3
ISBN
978-3-9816876-0-6
Price
free

Abstract

In various industrial processes involving liquid metals time-dependent magnetic fields are used for flow control, e. g. during the solidification process of silicon to improve the quality and efficiency of wafers. In order to investigate the interactions between conductive fluids and spatiotemporally varying magnetic fields numerical simulations are performed. The numerical models are verified at model experiments with low-melting alloys. A suitable measurement technique for flow mapping in such model experiments is ultrasound Doppler velocimetry (UDV). We present the Phased Array Ultrasound Doppler Velocimeter (PAUDV), which extends the conventional UDV with the ability to dynamically steer and focus the acoustic field. The custom host software for control and signal processing allows to conduct wide range of different experiments, e. g. two-point correlation in turbulent flows or the measurement of two velocity components with a single acoustic access. Experimental results from 2d-2c measurements and acquired two-point correlations are shown.

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