Abstract
Abstract A physical model and the mechanism of homogeneous condensation based on a new concept of molecular cluster dynamics in turbulent flows are examined. The physical model suggested considers the motion of molecular clusters in centrifugal fields of free eddies induced in turbulent flows. The clusters are moved to an eddy boundary region and concentrated in this region forming critically sized nuclei. Analysis of the suggested physical model shows that the small molecular clusters can be concentrated into the boundary region of the eddies. The existence of a critical velocity of fluid, below which nuclei are not formed, is theoretically confirmed, and it is shown that the value of the fluid critical velocity depends on the fluid's degree of supersaturation. An equation for the calculation of the number of droplets formed is proposed and the dependence of droplet number on fluid velocity is calculated. Steam molecular cluster sizes at different supersaturation degrees are also calculated. The physical model and the mechanism suggested provide a new framework for the description and design of condensation processes.
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