Dynamic behavior of a liquid metal interface under the influence of a high-frequency magnetic field.
We present experimental results on the stability of a free liquid metal surface influenced by an alternating magnetic field. The field is generated by an inductor fed by a high-frequency electrical current. The experimental setup consists of an annulus filled with the liquid metal galinstan. We observe three kinds of instabilities: exciting of capillary waves, a static high-amplitude surface deformation, and eventually an electromagnetic pinch at a critical inductor current I(cp). The data show that I(cp) correlates directly with the current frequency and the geometric parameters.
Mohring
Jens-Uwe
JU
Department for Electrical Engineering, Technische Universität Ilmenau P.O. Box 100565, 98684 Ilmenau, Germany.
Karcher
Christian
C
Schulze
Dietmar
D