Contactless inductive flow tomography

Details Contactless inductive flow tomography Contactless inductive flow tomography

2004-09-07

arxiv.org/abs/physics/0409036v1

Phys. Rev. E 70 (2004), 056306

Physics

Fluid Dynamics

9 Figures; to appear in Phys. Rev E

Scientific paper

10.1103/PhysRevE.70.056306

The three-dimensional velocity field of a propeller driven liquid metal flow is reconstructed by a contactless inductive flow tomography (CIFT). The underlying theory is presented within the framework of an integral equation system that governs the magnetic field distribution in a moving electrically conducting fluid. For small magnetic Reynolds numbers this integral equation system can be cast into a linear inverse problem for the determination of the velocity field from externally measured magnetic fields. A robust reconstruction of the large scale velocity field is already achieved by applying the external magnetic field alternately in two orthogonal directions and measuring the corresponding sets of induced magnetic fields. Kelvin's theorem is exploited to regularize the resulting velocity field by using the kinetic energy of the flow as a regularizing functional. The results of the new technique are shown to be in satisfactory agreement with ultrasonic measurements.

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