ABSTRACT
The inertia element of the oscillatory system is a column of the magnetic fluid in a pipe sustained above a closed air cavity as a result of the stabilisation of the fluid-gas interface by a heterogeneous magnetic field. When a certain height of the magnetic fluid-column is reached, the air bubbles, overcoming the levitation forces, penetrate through the ‘magnetic barrier’ and, consequently, the insulation of the gas cavity is disrupted. Therefore, when the magnetic field determines the orientation of the magnetic moment of the particle, this complicates its free rotation. The anisotropy of the magnetic fluid is determined by the presence in the disperse phase, in addition to the individual particles, of ellipsoidal aggregates fully oriented by a strong magnetic field. The presence in the magnetic fluid of the non-magnetic particles of the micron size predetermines the appearance of the magnetorheological effect in the system.
