抄録
Interfacial resonant phenomena of the lowest few modes of a magnetic fluid column supported by a magnetic field are examined experimentally in the presence of gravity. A magnetic fluid column, height 9.78 mm, is formed vertically between Helmholtz like coils fastened on an electrodynamic exciter, and vibrated vertically to produce axisymmetric oscillations. The transitions from standing waves to progressive waves are observed at the resonant ranges, and one-half sub-harmonic oscillations such as the mode (3,1), (4,1) and (5,1) appear at larger forcing amplitudes. The wave mode transitions between these subharmonic waves are also observed. These new phenomena are useful to discuss the liquid column oscillations in a microgravity environment in the Floating Zone Technique.
