Nonstationary Vapor Concentration Fields
near the Growing Droplet of Binary Solution

A. P. Grinin^†, F. M. Kuni, and A. A. Lezova

Physics Research Institute, St. Petersburg State University,
ul. Ul’yanovskaya 1, Petrodvorets, St. Petersburg, 198504 Russia

Received March 30, 2007

Abstract—Nonstationary vapor concentration fields near the droplet of binary solution growing in the vapor–
gas mixture are revealed using the concepts of similarity. The revealed fields are determined with the exact
account of the motion of droplet surface and refer to the times at which the droplet reaches sizes that provide
for the diffusion regime of droplet growth. To obtain the self-similar solution of the problem of binary conden-
sation, it is necessary to ensure a constant (in time) concentration of binary solution in the growing droplet. The
velocities of an increase in the number of molecules and the radius of two-component droplet with time are
found with allowance for the equation ensuring this solution. The conditions for the transformation of the self-
similar solution of the problem of the condensation of two-component mixture into the solution, which was
derived previously for the condensation of one component, are elucidated.

DOI: 10.1134/S1061933X08010031

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