Homogeneous Nucleation Rate in Supersaturated Water Vapor
The rate of homogeneous nucleation in supersaturated vapors of water was studied experimentally using a static diffusion chamber. Helium was used as a carrier gas. Droplets grown by condensation were observed by illuminating the chamber across its whole height with a flattened laser beam and recording digital images of droplets trajectories. Image analysis was used to determine local values of nucleation rate from droplets “starting positions”. Rates were studied in the range 3 × 10−1 − 3 × 102 cm−3 s−1 at four isotherms: 290, 300, 310, and 320 K. Measured isothermal dependencies of nucleation rate of water on supersaturation were compared with prediction of classical theory of homogeneous nucleation.
Keywords Homogeneous nucleation, static diffusion chamber, supersaturation, condensation, water
KeywordsNucleation Rate Atmospheric Aerosol Homogeneous Nucleation Liquid Pool Classical Nucleation Theory
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