Perturbation of eddy-currents by one inclusion in liquid metal

被引：4

作者：

Guichou, R. ^{[1
]}

Ayroles, H. ^{[1
]}

Zamansky, R. ^{[1
]}

Bergez, W. ^{[1
]}

Tordjeman, Ph. ^{[1
]}

Paumel, K. ^{[2
]}

机构：

[1] Univ Toulouse, IMFT, CNRS, Toulouse, France

[2] CEA, Nucl Technol Dept, DEN, F-13108 St Paul Les Durance, France

来源：

JOURNAL OF APPLIED PHYSICS | 2019年 / 125卷 / 09期

关键词：

FLOW;

D O I：

10.1063/1.5055062

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

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, Re-m, and a low shielding parameter, S-omega. 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.

引用

页数：6