Publications Repository - Helmholtz-Zentrum Dresden-Rossendorf

3 Publications

Experimental aspects of contactless inductive flow tomography

Gundrum, T.; Gerbeth, G.; Stefani, F.; Xu, M.

Exposing a moving electrically conducting fluid to an external magnetic field, one can measure the induced magnetic field in the exteriour of the fluid with the aim to reconstruct the flow field of the fluid. The application of two different external fields represents a certain minimum for the identification of the main topological structure of the flow. After delineating the theory of this measurement method in the framework of the integral equation approach to kinematic MHD, we report on an experiment with a propeller driven flow of InGaSn. In the basic version of this experiment, an axial and a transverse external field are produced by two orthogonal pairs of Helmholtz coils. The externally induced fields are measured by Hall sensors at 49 positions which cover the vessel rather homogeneously. By comparison with ultrasonic Doppler measurements, the method is shown to provide correct and robust results on the main topological structure and the magnitude of the flow. First results of an alternative variant using one homogeneous and one cusp field are presented. The potential advantages of using AC fields instead of DC fields to achieve a better depth resolution and to make the method applicable in rough industrial environments are also indicated.

  • Lecture (Conference)
    Joint 15th Riga and 6th PAMIR International Conference on Fundamental and Applied MHD, 27.06.-01.07.2005, Jurmala, Latvia
  • Contribution to proceedings
    Joint 15th Riga and 6th PAMIR International Conference on Fundamental and Applied MHD, 27.06.-01.07.2005, Jurmala, Latvia
    Proceedings 2(2005), 319-322
  • Magnetohydrodynamics 42(2006)2/3, 153-160
    ISSN: 0024-998X

Permalink: https://www.hzdr.de/publications/Publ-7357
Publ.-Id: 7357