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A new mechano-optical technique to measure local velocities in opaque fluids

Eckert, S.; Witke, W.; Gerbeth, G.

A novel technique has been developed to measure the local velocities in opaque liquid flows such as liquid metals. The measuring principle is based on the separation of a direct mechanical interaction between flow and sensor tip and the optical acquisition and processing of the signal. In principle, this fact allows the extension of the range of applicability to higher temperatures. Furthermore, the insensitivity of the system to electrical noise and external magnetic fields can be considered as an
important advantage. Until now, the sensor has been tested in metallic melts up to temperatures of about 350 °C. We present measurements of the local velocity obtained in an eutectic InGaSn melt driven by a rotating magnetic field.

Keywords: flow measurement technique; local sensor; velocity; opaque fluids; liquid metals; mechano-optical principle; rotating magnetic field

  • Flow Measurement and Instrumentation, Vol. 11/2 (2000) 71-78

Permalink: https://www.hzdr.de/publications/Publ-1507
Publ.-Id: 1507