Note: Void effects on eddy current distortion in two-phase liquid metal

Mithlesh Kumar (1) , Philippe Tordjeman (1) , Wladimir Bergez (1) , Matthieu Cavaro (2)

1 IMFT - Institut de mécanique des fluides de Toulouse
2 CEA Cadarache

A model based on the first order perturbation expansion of magnetic flux in a two-phase liquid metal flow has been developed for low magnetic Reynolds number Rem. This model takes into account the distortion of the induced eddy currents due to the presence of void in the conducting medium. Specific experiments with an eddy current flow meter have been realized for two periodic void distributions. The results have shown, in agreement with the model, that the effects of velocity and void on the emf modulation are decoupled. The magnitude of the void fraction and the void spatial frequency can be determined from the spectral density of the demodulated emf.

Mots clés: Fluid metal

Domaines: Mécanique des fluides [physics.class-ph]

Mithlesh Kumar, Philippe Tordjeman, Wladimir Bergez, Matthieu Cavaro. Note: Void effects on eddy current distortion in two-phase liquid metal. Review of Scientific Instruments, 2015, 86 (10), pp.106104. ⟨10.1063/1.4932990⟩. ⟨hal-01284031⟩