Dynamics of variations in size and composition of supercritical droplet at binary condensation |
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Authors: | A E Kuchma A K Shchekin F M Kuni |
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Institution: | 1.Department of Physics,St. Petersburg State University,Petrodvorets, St. Petersburg,Russia |
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Abstract: | A general analytical solution is found in quadratures for the radius and concentration of a solution droplet, which isothermally
grows or evaporates in a diffusion or free-molecular regime in a binary mixture of vapors. The obtained solution describes
the dynamics of variations in the size and composition of a super-critical droplet during the binary condensation in mixed
vapors at an arbitrary initial droplet composition. It is shown that, at small (linear) deviations of the growth regime and
droplet composition from the stationarity, these quadratures lead to the results that were recently obtained for the composition
relaxation in a growing droplet. Moreover, it is demonstrated that, in terms of the nonlinear theory, when the deviation of
solution concentration in a droplet from its stationary value is not small, it is invalid to use the law of stationary variations
in the size of a droplet with time to describe the relaxation process for its chemical composition. |
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