COMPUTATIONAL THERMODYNAMICS OF A COLLOID
OF ISOTROPIC FERROPARTICLES

B. E. Kashevskii

UDC 541.18:536.7

The influence of interparticle magnetic interactions on 
the aggregate state of the system of isotropic ferrocolloidal particles 
is investigated. To describe the orientation state and the local structure 
of a colloid, we use a combined numerical method, including direct 
modeling of translational Brownian dynamics of an aggregate of particles, 
and an approximate description of their orientation state by the self-consistent 
method. To calculate the contribution of magnetic interactions to 
the thermodynamic properties of a colloid, the thermodynamic process 
of heating the Brownian ensemble is realized numerically. The magnetic 
additive to the free energy and the chemical potential of a ferrocolloid 
have been determined. It has been found that the system of ferrocolloidal 
particles has critical points of the gas-liquid and gas-solid transitions 
and can be found in three aggregate states.

A. V. Luikov Heat and Mass Transfer Institute, National 
Academy of Sciences of Belarus, Minsk; email: bekas@cp15.itmo.by. 
Translated from Inzhenerno-Fizicheskii Zhurnal, Vol. 75, No. 4, pp. 
28-33, July-August, 2002. Original article submitted December 27, 2001.

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