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Contactless Inductive Bubble Detection in a Liquid Metal Flow.

Thomas Gundrum1, Philipp Büttner2, Bachir Dekdouk3

  • 1Institute of Fluid Dynamics, Helmholtz-Zentrum Dresden-Rossendorf, Bautzner Landstr. 400, Dresden 01328, Germany. th.gundrum@hzdr.de.

Sensors (Basel, Switzerland)
|January 12, 2016
PubMed
Summary

This study presents a contactless electromagnetic induction sensor for detecting bubbles in opaque, high-temperature liquid metals. The system successfully identified bubbles in sodium and gallium alloys, offering a novel solution for industrial monitoring.

Keywords:
bubble detectioncontactless inductive measurementsliquid metaltwo phase flowvoid fraction

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Area of Science:

  • Materials Science
  • Physics
  • Engineering

Background:

  • Detecting bubbles in liquid metals is crucial for industrial processes due to their opacity and high temperatures.
  • Traditional measurement systems face challenges with these extreme conditions.
  • Liquid metals' high electrical conductivity offers potential for non-invasive sensing techniques.

Purpose of the Study:

  • To develop and demonstrate a contactless measurement system for detecting bubbles in liquid metals.
  • To leverage electromagnetic induction for sensing in challenging environments.
  • To validate the system's performance with different liquid metal types.

Main Methods:

  • A contactless sensor system was designed using one excitation coil and a pickup coil system.
  • The system operates on the principle of electromagnetic induction.
  • Experiments were conducted using sodium flow in a stainless steel pipe and a liquid gallium alloy column.

Main Results:

  • The developed sensor system effectively detected bubbles in both sodium and liquid gallium alloy.
  • The contactless nature of the method overcomes challenges posed by high temperatures and opacity.
  • Successful bubble detection was achieved in a stainless steel pipe environment.

Conclusions:

  • Electromagnetic induction provides a viable method for bubble detection in liquid metals.
  • The presented sensor system is effective for monitoring bubble presence in industrial applications.
  • This technology offers a robust solution for harsh liquid metal environments.