Interaction forces between magnetic floating disks on a free surface of a viscous liquid

Article type: Research Article

Authors: Vinsard, Gérard^a | Dufour, Stéphane^a;

Affiliations: [a] CNRS, LEMTA, Université de Lorraine, Vandoeuvre-lès-Nancy, France

Correspondence: [*] Corresponding author: Stéphane Dufour, CNRS, LEMTA, Université de Lorraine, Vandoeuvre-lès-Nancy, France. E-mail: stephane.dufour@uni-lorraine.fr

Abstract: A model to compute the forces between small and thin co-planar magnetic disks submitted to an uniform source magnetic field is built with the help of a pseudo magnetic dipole formula, in a similar way as the one used for beads. These forces are used to compute the motion of such disks floating on the top of a viscous liquid. Numerical results are compared to experimental data: it shows a good qualitative accordance.

Keywords: Magnetic dipole, demagnetizing factor, magnetic disk

DOI: 10.3233/JAE-171009

Journal: International Journal of Applied Electromagnetics and Mechanics, vol. 59, no. 2, pp. 385-390, 2019