Anisotropy of magnetic emulsions induced by magnetic and electric fields

The anisotropy of magnetic emulsions induced by simultaneously acting electric and magnetic fields is theoretically and experimentally investigated. Due to the anisotropy, the electric conductivity and magnetic permeability of a magnetic emulsion are no longer scalar coefficients, but are tensors. The electric conductivity and magnetic permeability tensors of sufficiently diluted emulsions in sufficiently weak electric and magnetic fields are found as functions of the electric and magnetic intensity vectors. The theoretically predicted induced anisotropy was verified experimentally. The experimental data are analyzed and compared with theoretical predictions. The results of the analysis and comparison are discussed.Comment: 11 pages, 7 figures; the revision resulted from the publication proces

Structural Organization in the System of Magnetized Aggregates in Elliptically Polarized Rotating Magnetic Field

Observed data supporting the possibility of magnetic ordering in magnetic colloids are reported. A pos-sibility of aggregate spatial ordering in a system of magnetized aggregates was found under the influence of rotating and crossed constant and alternating magnetic fields. When you are citing the document, use the following link http://essuir.sumdu.edu.ua/handle/123456789/3627

Dynamics of a dielectric droplet suspended in a magnetic fluid in electric and magnetic fields

The behavior of a microdrop of dielectric liquid suspended in a magnetic fluid and exposed to the action of electric and magnetic fields is studied experimentally. With increasing electric field, the deformation of droplets into oblate ellipsoid, toroid and curved toroid was observed. At the further increase in the electric field, the bursting of droplets was also revealed. The electrorotation of deformed droplets was observed and investigated. The influence of an additional magnetic field on the droplet dynamics was studied. The main features of the droplet dynamics were interpreted and theoretically examined.Comment: 23 pages, 11 figure

DETERMINATION OF THE SURFACE DENSITY OF POLARIZATION CHARGE OF THE MAGNETIC FLUID JET IN UNIFORM ELECTRIC FIELD

The article is dedicated to an actual problem of the study of the behavior of the magnetic fluid jet in electrical and magnetic fields. A new method of calculation of value of density of the surface charge formed on the magnetic fluid jet surface is proposed; the hypothesis of surface charge formation mechanism is presented

Motion of a deformable drop of magnetic fluid on a solid surface in a rotating magnetic field

The behavior of a magnetic fluid drop lying on a solid horizontal surface and surrounded by a nonmagnetic liquid under the action of a uniform magnetic field which is rotating in a vertical plane with low frequency (of the order of 1 Hz) has been investigated experimentally. Shape deformation and translatory motion of the drop were observed and studied. The drop translation velocity for different field amplitudes and field frequencies has been measured.Comment: 9 pages, 4 figure