Abstract
The article addresses theoretical approaches in describing the evolution of particulate assemblages in metastable liquids. The evolutionary model to deal with such processes and phenomena is put forward, which is based on the Fokker–Planck equation for the particle-size distribution function and on the mass/heat balance equation for the degree of metastability. The model is generalized in describing various phase transformation phenomena met in materials science and condensed matter physics. Two general analytical approaches in solving the generalized integro-differential model are considered with special attention to crystallization processes in supercooled and supersaturated liquids, evaporation of liquid droplets and dissolution of dispersed solids. These analytical theories are based on the saddle-point method in solving the integro-differential equation for the degree of system metastability and on the separation of variables in the kinetic and balance equations with subsequent summation or integration over different elementary solutions. The main focus here is to determine the analytical expressions for the particle-size distribution function and the degree of metastability dependent on the evolutionary kinetics of particulate assemblages in metastable media.
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