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Phys Rev E Stat Nonlin Soft Matter Phys. 2014 May;89(5):053014. Epub 2014 May 16.

Instabilities in electromagnetic quasilevitation.

Author information

1
Department of Mathematics, University of Waikato, Hamilton, New Zealand and SIMAP/EPM Laboratory, Grenoble Polytechnic Institute, Grenoble, France.
2
SIMAP/EPM Laboratory, Grenoble Polytechnic Institute, Grenoble, France.
3
Department of Mathematics, University of Waikato, Hamilton, New Zealand.

Abstract

We investigate free-surface instabilities occurring in various industrial processes involving liquid metal. Of particular interest is the behavior of the free surface of a pool of liquid metal when it is submitted to an alternating magnetic field. Experimentally, we study the effect of a vertical alternating medium-frequency magnetic field on an initially circular pool. We observe various types of behavior according to magnetic field amplitude, e.g., axisymmetric deformations, azimuthal mode structures, slow radial oscillation of the pool perimeter, and random rotation of the pool around its center. Drop rotation could be attributed to nonsymmetric shape deformations. The effect of oxidation leads to drastic changes in pool behavior. The experimental results are then compared to a linear stability analysis of the free surface of a circular liquid drop.

PMID:
25353887
DOI:
10.1103/PhysRevE.89.053014

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