Experimental Study on Oscillation of Single Spike of Magnetic Fluid under Vertical Alternating Magnetic Field.

Experiments were made on the oscillation of a single spike of a magnetic fluid droplet under a vertical alternating magnetic field. A kind of resonance was found to occur in certain ranges of the frequency and the amplitude of the magnetic field. Three types of oscillation patterns were observed, i.e., mode 1 with one node, mode 2 with two nodes and a peculiar oscillation between these modes. The frequencies of models 1 and 2 were twice that of the magnetic field, while the frequency of the peculiar oscillation was the same as that of the magnetic field.