The Simulation of High Pressure Nucleation Experiments in Diffusion Cloud Chamber

Details The Simulation of High Pressure Nucleation Experiments in Diffusion Cloud Chamber The Simulation of High Pressure Nucleation Experiments in Diffusion Cloud Chamber

2007-12-12

arxiv.org/abs/0712.1944v1

Physics

Chemical Physics

20 pages, 8 figures

Scientific paper

For high- pressure nucleation experiments in upward diffusion cloud chamber, there is the great deviation of predictions of classical nucleation theory from experimental results; the discrepancy is more than 10 orders of magnitude of nucleation rate. Experimental data for 1-propanol vapor are under investigation in this paper. It was shown that mathematical model of a single droplet growth and motion semi- quantitatively explained all experimentally discovered regularities. For explanations low nucleation rate versus high supersaturation, the coalescence mechanism in gaseous phase has been proposed. As result of coalescence the vast majority of newly formed clusters evaporate and restore vapor density and temperature profile in DCC. The observed picture with low nucleation rate is result of diffusion interaction between small clusters and droplets in nucleation zone for high- pressure nucleation experiments.

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