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Perturbation of eddy-currents by one inclusion in liquid metal

Guichou, Rafaël and Ayroles, Hervé and Zamansky, Rémi and Bergez, Wladimir and Tordjeman, Philippe and Paumel, Kevin Perturbation of eddy-currents by one inclusion in liquid metal. (2019) Journal of Applied Physics, 125 (9). 1-6. ISSN 0021-8979

(Document in English)

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Official URL: https://doi.org/10.1063/1.5055062


In this article, we present an analytical model to calculate the perturbation of the magnetic vector potential due to a non-conducting inclusion in a liquid metal translated at constant velocity. The model is valid for a low magnetic Reynolds number, Rem, and a low shielding parameter, Sω. We establish that the first order perturbation of the vector potential can be directly obtained from the value of the unperturbed eddy-current calculated at the location of the inclusion. An ECFM (Eddy-Current FlowMeter) device has been designed to validate the model and to study the frequency effects of the eddy-current and the volume of one inclusion and its location. We observe a good agreement between the model predictions and experimental data within the limit of the validity of the model. Based on scaling analysis, we show that a unique relation exists between the perturbation of the emf (electromotive force) measured with the ECFM and the volume of the inclusion and its location, which reflects the self-similarity of the model solution.

Item Type:Article
HAL Id:hal-02134624
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Commissariat à l'Energie Atomique et aux énergies alternatives - CEA (FRANCE)
French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UT3 (FRANCE)
Laboratory name:
Commissariat à l'Énergie Atomique et aux Énergies Alternatives - CEA (FRANCE)
Deposited On:16 May 2019 09:00

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