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Article Dans Une Revue Physical Review Online Archive (PROLA) Année : 2014

Instabilities in electromagnetic quasilevitation

Résumé

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.

Domaines

Matériaux
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Dates et versions

hal-01122448 , version 1 (03-03-2015)

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Citer

Kirk Spragg, Sebastien Letout, R. Ernst, Alfred Sneyd, Yves Fautrelle. Instabilities in electromagnetic quasilevitation. Physical Review Online Archive (PROLA), 2014, 89 (5), pp.13. ⟨10.1103/PhysRevE.89.053014⟩. ⟨hal-01122448⟩
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