Evolution of cluster size distribution during nucleation with rapidly changing dynamic gas processes

A non-steady-state solution of the Zel'dovich equation for the cluster size distribution function has been obtained. The solution is applicable in the entire range of cluster sizes. The relaxation time of the quasi-steady-sta te distribution and the partial time lags of cluster formation were derived and analyzed. The dependence of these times on cluster size was investigat ed. Expressions for the quasi-steady-state flux and the induction times hav e been derived. The accuracy of these calculations is confirmed by comparis on with numerical calculations by other authors. (C) 2000 MAIK "Nauka/ Inte rperiodica".