Thermal and fluctuation effects of nonisothermal nucleation

The process of nucleation is investigated on the basis of the two-dimensional balance equation in which the independent variables are the number of moleculi and the temperature of generation of condensed phase in the vapour-gas medium. A certain generalization of the Fokker–Planck method is suggested which makes it possible to take into account large values of the condensation heat for the vapour molecula in the new phase particle. The hyerarchy of time scales of nonisothermic nucleation is constructed. Heat relaxation of new phase particles as well as their subsequent evolution and the final stationary state are analytically described. Contributions of the heat and iluctuation effects into the nonisothermic nucleation rate are calculated.