Work

Electromagnetic levitation of liquid metal droplets under a horizontal DC magnetic field

Year: 2025

Type: article

Abstract: Electromagnetic levitation of the droplets of Cu and Ni under the superposed horizontal DC magnetic field up to 4.5 T is studied experimentally. The levitation coil alimented with a 140 kHz AC electric current was placed inside a DC magnetic field generated with a Helmholtz coil. It was found that the droplet deformation enhanced at a DC magnetic field of low intensity, B DC < 3 T, however, with a further increase in the intensity of DC magnetic field, the droplets were almost immobilized. The motion of oxide particles over the droplets’ surface indicated that a residual velocity may still exists in the droplet subjected to the DC magnetic field B DC = 4.5 T. The amplitude of a triggered oscillatory motion of the droplets under B DC ⩾ 3.5 T was attenuated exponentially, the amplitude decay rate found to be proportional to the electrical conductivity of the liquid, but not to B DC 2 . Finally, the origin of the destabilizing effect of the DC magnetic field on droplet deformation, and its stabilizing effect on droplet displacement, is discussed and is attributed to the spatial variation of the DC magnetic field.

Source: Journal of Physics D Applied Physics

DOI: 10.1088/1361-6463/ae27db

Authors: R Pons, A El Bakali, D Chaussende, P Chometon, O Budenkova

Institutions: Institut polytechnique de Grenoble, Centre National de la Recherche Scientifique, Science et Ingénierie des Matériaux et Procédés, Université Grenoble Alpes, Institut Néel

Language: English

Topic: Electrowetting and Microfluidic Technologies

Subfield: Electrical and Electronic Engineering

Field: Engineering

Domain: Physical Sciences

Open Access status: hybrid

Estimated APC paid: $3,325

Funder: Université Grenoble Alpes