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. JEPTER7492020028 JEPTER749208