KINETICS OF NONEQUILIBRIUM MELTING OF A MACROSYSTEM UNDER THE ACTION OF A VOLUME HEAT SOURCE

A kinetic model of nonequilibrium melting of a macrosystem under the action of a volume heat source formed in its bulk has been constructed. In this model, the melting of such a system is defi ned with account of the thermodynamic fl uctuations of its order parameter, playing a great role in the superheating of the system and in the attainment by it of the absolute instability point at which the initially metastable solid phase of the system becomes absolutely unstable relative to the infi nitely small fl uctuations of its liquid phase. Analytical solutions of the kinetic equations defi ning the melting of a macrosystem have been obtained for different rates of its heating by an internal volume heat source.
   
Author:  E. E. Slyadnikov, Yu. A. Khon, P. P. Kaminskii, and I. Yu. Turchanovskii
Keywords:  macrosystem, nonequilibrium phase transition, heat source, kinetic equations