Showing 1 - 10 of 13
Particle condensation in magnetorheological suspensions (MRS) under external magnetic field is studied theoretically. It is shown that the bulk condensation of particles into dense phases is preceded by the formation of fairly long chain aggregates. Phase transition occurs as a condensation of...
Persistent link: https://www.econbiz.de/10010874403
Many experiments demonstrate that dense drop-like aggregates, consisting of tremendous number of magnetic particles, appear in ferrofluids under the action of quite moderate magnetic fields. We present results of theoretical study of influence of these aggregates on macroscopical rheological...
Persistent link: https://www.econbiz.de/10010871617
In this paper we have investigated theoretically deformational phase transitions in ferrosmectics. These transitions can be induced by external field normal to smectic layers as well as by attraction of particles belonging to different smectic layers. Ferrosmectic structure deformation has been...
Persistent link: https://www.econbiz.de/10010587363
The non-equilibrium properties of nematic systems consisting of solid rod-like particles with constant magnetic or electric moment are investigated. The analysis is performed on the basis of the Fokker-Plank equation for one-particle orientational distribution function. By using approximate...
Persistent link: https://www.econbiz.de/10010587386
Many experiments show that drop-like aggregates, consisting of tremendous number of magnetic particles, can appear in ferrofluids under suitable conditions. Our work deals with theoretical study of influence of these drops on macroscopical rheological properties of the systems. The estimates...
Persistent link: https://www.econbiz.de/10010589121
The work deals with the theoretical study of domain structures in a ferrofluid, filling a thin flat gap with hard non-magnetic walls, placed into magnetic field, perpendicular to the gap plane. Two experimentally observed types of these structures are considered. The first one is the direct...
Persistent link: https://www.econbiz.de/10010590112
In this paper we investigate theoretically the equilibrium phase transitions in ferronematics taking into account the steric and magnetic interactions of colloid particles. The systems of two kinds are considered: in the first one the particles magnetic moment can be parallel or antiparallel to...
Persistent link: https://www.econbiz.de/10010586265
The thermodynamical properties of suspensions of rigid stretched particles in liquid crystal solvent are studied with the help of modification of Mc Millan and Maier-Saupe theories. We have shown that the presence of particles increases the temperatures of phase transitions isotropic...
Persistent link: https://www.econbiz.de/10011057296
We present results of theoretical study of quasielastic behavior of ferrofluid filling a thin flat gap, placed into perpendicular magnetic field. When the field exceeds a certain critical magnitude, magnetic particles form dense discrete domains, elongated along the field, and linking the gap...
Persistent link: https://www.econbiz.de/10011063677
Condensation phase transitions in polydisperse colloids are studied theoretically. For maximal simplification of calculations, a bidisperse model of the system, consisting of relatively big and small particles, is considered. Direct van der Waals interactions between big particles as well as...
Persistent link: https://www.econbiz.de/10011057794